TY - BOOK ED - United States. ED - United States. TI - Extension service review SN - 0014-5408 U1 - 630.72073 PY - 1930///-1978 CY - Washington, D.C. PB - U.S. Department of Agriculture, Extension Service KW - Agriculture KW - Research KW - United States N1 - Cover title; Library has vol 47, no.3 ER -