TY  - BOOK
AU  - Riehl,Jerry A.
ED  - United States.
TI  - Development Of a strategy for sampling tree rings
U1  - 571.2 
PY  - 1979///
CY  - WAshington
PB  - United States Environmental Protection Agency
KW  - Crops
KW  - Physiology
KW  - Plant physiology
KW  - United States
N1  - EPA-600/3-79-030
ER  -