TY  - BOOK
AU  - Gray,Dwight E.
TI  - Man and his physical world
AV  - Q160 .G7 1946
U1  - 500 
PY  - 1946///
CY  - New York
PB  - D. Van Nostrand Company, inc.
KW  - Science
KW  - Local
N1  - Charts on lining-papers; "First published September, 1942 ... Second edition October, 1946; "Reading list": p. 671-680
ER  -