TY  - BOOK
AU  - Curtis,Helena
TI  - Invitation to biology
SN  - 087901072X
AV  - QH 308 .2 .C87 1977 .C87 1977
U1  - 574 
PY  - 1977///
CY  - New York
PB  - Worth Publishers
KW  - Biology
N1  - Includes bibliographies and index
ER  -