TY  - BOOK
AU  - Clark,Charles Frederick
AU  - Lombard,P.M.
TI  - Descriptions of and key to American potato varieties
T2  - U. S. Dept. of Agriculture. Circular
AV  - SB211.P8 C63
U1  - 633.491 
PY  - 1951///
CY  - Washington
PB  - [U.S. Govt. Print. Off.]
KW  - Potatoes
KW  - Varieties
N1  - Cover title; "Literature cited": p. 52-54
ER  -