TY  - BOOK
AU  - Clarke,George L.
TI  - Elementos de ecología
AV  - QH541 .C47 1954
U1  - 575.3574.5* 
PY  - 1971///
CY  - Barcelona
PB  - Ediciones Omega, S.A.
KW  - Ecology
N1  - Translation of : Elements of ecology; Includes bibliography
ER  -