TY - JOUR AU - Rollins, W. C. AU - Wagnon, K. A. AU - Carroll, F. D. AU - Loy, R. G. TI - Hybrid vigor estimates for first backcross of crisscross breeding systems involving Angus and Hereford breeds JF - California Agriculture JO - Calif Agr Y1 - 1970/05/01 VL - 24 IS - 5 SP - 6 EP - 7 PB - University of California Agriculture and Nature Resources SN - 0008-0845 UR - http://www.ucanr.edu/sites/calagjournal/archive/?article=ca.v024n05p6 AB - CROSSES BETWEEN THE Aberdeen Angus, Hereford and Shorthorn breeds are becoming increasingly popular in the production of market calves—reflecting (in part) the impact of recently published results of experiment station trials of two-way and three-way crosses.