TY  - BOOK
AU  - Clark, Mary E.
TI  - Contemporary biology: concepts and implications 
SN  - 0721625975
AV  - QH308.2 .C53
U1  - 574 
PY  - 1973///
CY  - Philadelphia
PB  - Saunders
KW  - Biology
N1  - Includes bibliographical references and index
ER  -