TY  - BOOK
AU  - ZIMDAHL, Robert L.
TI  - Weed crop competition                                                            : a review
PY  - 1980///
CY  - Oergon
PB  - International Plant Protection Center
KW  - Weeds
KW  - Plant competition
KW  - Biography
N1  - Includes bibliographical references and index
ER  -