div class=ts-pagebuttonPage 1button div class=ts-image amp-img class=ts-thumb alt=Page 1: Department of Science and Technologyphiljournalscidostgovphimagespdfpjs_pdfvol · In the early 1960s the group of the late Dr Emerita V de Guzman De Guzman Del Rosario src=https:reader033vdocumentsmxreader033viewer20220506095fb0d6ba05def74d2f080e25html5thumbnails1jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 2button div class=ts-image amp-img class=ts-thumb alt=Page 2: Department of Science and Technologyphiljournalscidostgovphimagespdfpjs_pdfvol · In the early 1960s the group of the late Dr Emerita V de Guzman De Guzman Del Rosario src=https:reader033vdocumentsmxreader033viewer20220506095fb0d6ba05def74d2f080e25html5thumbnails2jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 3button div class=ts-image amp-img class=ts-thumb alt=Page 3: Department of Science and Technologyphiljournalscidostgovphimagespdfpjs_pdfvol · In the early 1960s the group of the late Dr Emerita V de Guzman De Guzman Del Rosario src=https:reader033vdocumentsmxreader033viewer20220506095fb0d6ba05def74d2f080e25html5thumbnails3jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 4button div class=ts-image amp-img class=ts-thumb alt=Page 4: Department of Science and Technologyphiljournalscidostgovphimagespdfpjs_pdfvol · In the early 1960s the group of the late Dr Emerita V de Guzman De Guzman Del Rosario src=https:reader033vdocumentsmxreader033viewer20220506095fb0d6ba05def74d2f080e25html5thumbnails4jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 5button div class=ts-image amp-img class=ts-thumb alt=Page 5: Department of Science and Technologyphiljournalscidostgovphimagespdfpjs_pdfvol · In the early 1960s the group of the late Dr Emerita V de Guzman De Guzman Del Rosario src=https:reader033vdocumentsmxreader033viewer20220506095fb0d6ba05def74d2f080e25html5thumbnails5jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 6button div class=ts-image amp-img class=ts-thumb alt=Page 6: Department of Science and Technologyphiljournalscidostgovphimagespdfpjs_pdfvol · In the early 1960s the group of the late Dr Emerita V de Guzman De Guzman Del Rosario src=https:reader033vdocumentsmxreader033viewer20220506095fb0d6ba05def74d2f080e25html5thumbnails6jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 7button div class=ts-image amp-img class=ts-thumb alt=Page 7: Department of Science and Technologyphiljournalscidostgovphimagespdfpjs_pdfvol · In the early 1960s the group of the late Dr Emerita V de Guzman De Guzman Del Rosario src=https:reader033vdocumentsmxreader033viewer20220506095fb0d6ba05def74d2f080e25html5thumbnails7jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 8button div class=ts-image amp-img class=ts-thumb alt=Page 8: Department of Science and Technologyphiljournalscidostgovphimagespdfpjs_pdfvol · In the early 1960s the group of the late Dr Emerita V de Guzman De Guzman Del Rosario src=https:reader033vdocumentsmxreader033viewer20220506095fb0d6ba05def74d2f080e25html5thumbnails8jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 9button div class=ts-image amp-img class=ts-thumb alt=Page 9: Department of Science and Technologyphiljournalscidostgovphimagespdfpjs_pdfvol · In the early 1960s the group of the late Dr Emerita V de Guzman De Guzman Del Rosario src=https:reader033vdocumentsmxreader033viewer20220506095fb0d6ba05def74d2f080e25html5thumbnails9jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 10button div class=ts-image amp-img class=ts-thumb alt=Page 10: Department of Science and Technologyphiljournalscidostgovphimagespdfpjs_pdfvol · In the early 1960s the group of the late Dr Emerita V de Guzman De Guzman Del Rosario src=https:reader033vdocumentsmxreader033viewer20220506095fb0d6ba05def74d2f080e25html5thumbnails10jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 11button div class=ts-image amp-img class=ts-thumb alt=Page 11: Department of Science and Technologyphiljournalscidostgovphimagespdfpjs_pdfvol · In the early 1960s the group of the late Dr Emerita V de Guzman De Guzman Del Rosario src=https:reader033vdocumentsmxreader033viewer20220506095fb0d6ba05def74d2f080e25html5thumbnails11jpg width=142 height=106 layout=responsive amp-img divdiv