TY  - BOOK
AU  - Purves, William Kirkwood
AU  - Orians,Gordon H.
TI  - Life: The science of biology, second edition 
SN  - 0878937331
AV  - QH308.2 P87 1987
PY  - 1987///
CY  - Sunderland, massachusetts
PB  - Sinauer associates
KW  - Biología
ER  -