TY  - BOOK
AU  -  Stakman,E.C.
AU  -  Harrar,Jacob George
TI  -  Principles of plant pathology / 
U1  -  571.92   22
PY  - 1957///
CY  -  New York : 
PB  -  Ronald Press Co., 
KW  -  Plant diseases
N1  -  Includes bibliographical references
ER  -