TY  - BOOK
AU  - Hopson, Janet L.
AU  - Wessells, Norman K.
ED  - 
ED  - 
ED  - 
ED  - 
SN  - 0071007385;9780071007382;0075571080;9780075571087
SN  - 2
PY  - 1990///];copyright 1990.46
CY  - New York
PB  - McGraw-Hill
KW  - 
KW  - 2
KW  - 0
KW  - 6
KW  - 20
KW  - Biology
N1  - Includes bibliographical references (p. A6-A12); 5
ER  -