-
491
-
492
-
493
-
494
-
495
-
496
-
497
Philippine vegetable tanning materials
Argitaratua izan da Journal of the Philippine Pharmaceutical AssociationArtikulua -
498
Cinchona alkaloid extraction by ion exchange (preliminary investigation)
Argitaratua izan da Journal of the Philippine Pharmaceutical AssociationArtikulua -
499
-
500