TY  - BOOK
AU  - Shelford,Victor E.
TI  - The ecology of North America
AV  - QH102 .S5
U1  - 574.5097 
PY  - 1963///
CY  - Urbana
PB  - University of Illinois Press
KW  - Ecology
KW  - North America
N1  - Bibliography: p. 495-531
ER  -