TY  - BOOK
AU  - Cheronis,Nicholas Dimitrius
TI  - The study of the physical world
AV  - Q160 .C34 1950
U1  - 500 
PY  - 1950///]
CY  - Boston
PB  - Houghton Mifflin
KW  - Science
KW  - Local
N1  - Includes bibliographies
ER  -