TY  - BOOK
AU  - Elton,Charles S., x
AU  - x
TI  - The ecology of invasions by animals and plants: x
SN  - x
U1  - 574.5/ELE 
PY  - 1972///
CY  - London
PB  - Chapman and hall
KW  - Ecology
N1  - x
ER  -