TY - JOUR AU - Kohl, Harry C. TI - Effect of lenath of dhotoperiod on grapefruit seedlings JF - California Agriculture JO - Calif Agr Y1 - 1960/03/01 VL - 14 IS - 3 SP - 8 EP - 8 PB - University of California Agriculture and Nature Resources SN - 0008-0845 UR - http://www.ucanr.edu/sites/calagjournal/archive/?article=ca.v014n03p8d AB -