Livestock Improvement: in relatioin to heredity and environment J.E. Nichols text SL] The iowa state collage press 1957 4 en IX, 240 p.: ill.; ref. 22 cm + Indexs LIVESTOCK -- INVIRONMENT -- PROGENY TEST 636.083/NIC/l 210519 20210519133622 INLIS000000000003297 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)