00000cab a22000003a 4500 UP-1685523046126208541 Buklod 20231008011650.0 m |o d | ta 101124s xx d | ||r ||||| || Pharm-UPM eng Pascual, O.S. Steric and polar hindrance to motion O.S. Pascual. pp. 387-395 Motion. Journal of the Philippine Pharmaceutical Association 45, 1-12 (1958). UPMNL PHARM Article