TY  - BOOK
AU  - Ricklefs, Robert E.
TI  -  The economy of nature: a textbook in basic ecology 
SN  - 071672409X
U1  - 577  23
PY  - 1993///
CY  - New York
PB  - W.H. Freeman
KW  - Ecology
N1  - Includes bibliographical references and index
ER  -