TY - BOOK ED - United States. TI - [Better plants and animals T2 - Its Yearbook of agriculture, AV - S21 .A35 1936-1937 U1 - 631.52 PY - 1936///-37] CY - Washington PB - U.S. Govt. Print. Off. KW - Genetics KW - Research KW - Plant breeding KW - Livestock N1 - Includes bibliographies ER -