TY  - BOOK
AU  - Heald,F.D.
TI  - Introduction to plant pathology,
AV  - SB731 .H38 1943
U1  - 581.2 
PY  - 1943///
CY  - New York, London
PB  - McGraw-Hill
KW  - Plant diseases
N1  - Includes bibliographies
ER  -