R. J. Downs

Downs, R. J., & Thomas, J. F. (1990). Morphology and reproductive development of soybeans under artificial conditions. Biotronics, 19, 19.

Downs, R. J. (1989). Reflector design for HID [high intensity discharge] lamps used in plant growth chambers. Paper (American Society of Agricultural Engineers), (89-4581), 13.

Downs, R. J. (1985). Irradiance and plant growth in greenhouses during winter. HortScience, 20(6), 1125.

DOWNS, R. J., & THOMAS, J. F. (1982). PHYTOCHROME REGULATION OF FLOWERING IN THE LONG-DAY PLANT, HYOSCYAMUS-NIGER. PLANT PHYSIOLOGY, 70(3), 898–900. https://doi.org/10.1104/pp.70.3.898

Downs, R. J. (1975). Controlled environments for plant research. New York: Columbia University Press.