TY  - BOOK
AU  - Clark,C.C., x
AU  - x
TI  - This living world: college course in science
SN  - x
U1  - 500/CLT 
PY  - 1940///
CY  - New York
PB  - McGraw-Hill
KW  - Science
KW  - Biology
N1  - Includes
ER  -