AUTHOR
Concepcion, Gisela P. Padilla
1
De Vries, Louis 1885-1976
1
National Academy of Science and Technology (Philippines)
1
National Research Council of the Philippines
1
Padlan, Eduardo A.
1
Saloma, Caesar A.
1
University of the Philippines (Diliman). College of Liberal Arts
1
University of the Philippines Press
1