TY - JOUR AU - Jenkins, Bryan M. TI - Alternative greenhouse heating systems JF - California Agriculture JO - Calif Agr Y1 - 1985/05/01 VL - 39 IS - 5 SP - 5 EP - 7 PB - University of California Agriculture and Nature Resources SN - 0008-0845 UR - http://www.ucanr.edu/sites/calagjournal/archive/?article=ca.v039n05p5 AB -