TY  - BOOK
AU  - O'Brien,Muriel J.
AU  - Rich,Avery E.
ED  - United States. Department of Agricuture. Agricutural Research Services.
TI  - Potato diseases
T2  - Agriculture handbook ; no. 474
AV  - S21SB608.P8 .A37 no. 474
U1  - 630/.8 s633/.491/9 
PY  - 1976///
CY  - Washington
PB  - U.S. Dept. of Agriculture, Agricultural Research Service
KW  - Potatoes
KW  - Diseases and pests
ER  -