TY  - BOOK
T1  - Discovering the world of science
A1  - Obourn, Ellsworth Scott, 1897-
PP  - Princeton
PB  - D. Van Nostrand
YR  - 1963
UL  - https://tuklas.up.edu.ph/Record/UP-8027390931313712139
OP  - 408
CN  - 500 O28
ER  -