TY  - JA
AU  - Levitt,J.
TI  - Crop tolerance to suboptimal land conditions--a historical overview [Emphasis on terminology and concepts]
U1  - 79-389614 
PY  - 1978///
KW  - Miscellaneous plant disorders
N1  - Ref. Review
T2  - ASA Special Publication American Society of Agronomy
ER  -