TY  - BOOK
AU  - Aldrich, R.J.
TI  - Weed-crop ecology: principles in weed  management 
SN  - 0534028330
AV  - SB611 ALD
PY  - 1984///
CY  - Massachusetts
PB  - Breton  publishers
N1  - includes bibliographical references amdindex
ER  -