TY  - BOOK
AU  - Zimdahl,Robert L.
TI  - Weed crop competition: a review 
AV  - SB611 Z56 
PY  - 1980///
CY  - Oregon
PB  - International Plant Protection Center Oregon State University
KW  - Weeds
KW  - Pests and diseases
N1  - Includes bibliographical references and index
ER  -