المؤلفون: Levis, Donald G.

المصدر: Historical Materials from University of Nebraska-Lincoln Extension

مصطلحات الفهرس: management, replacement, gilts, efficient reproduction, reproduction, selecting gilts, weaning, birth, floor space, rearing mates, ear-notching gilts, litter, notches, swine, publications, agriculture, animal science, Extension publications, Agriculture, Curriculum and Instruction, text

URL: http://digitalcommons.unl.edu/extensionhist/1377
http://digitalcommons.unl.edu/cgi/viewcontent.cgi?article=2371&context=extensionhist