TY  - BOOK
AU  - Cronk, Q.C.B.  .
TI  - Plant invaders the threat to natural econsystems / 
SN  - 1-85383-782-2
U1  - J(X:531) 
PY  - 2001///
CY  - London : 
PB  - Earthscan Publications Ltd. , 
KW  - Agriculture
ER  -