Wain, R., & Wightman, F. (1956). Chemistry and mode of action of plant growth substances: Proceedings of a symposium held at Wye College ( University of London ) July 1955. Butterworths scientific publications.

Wain, R.L, and F. Wightman. Chemistry and Mode of Action of Plant Growth Substances: Proceedings of a Symposium Held at Wye College ( University of London ) July 1955. London: Butterworths scientific publications, 1956.

Wain, R.L, and F. Wightman. Chemistry and Mode of Action of Plant Growth Substances: Proceedings of a Symposium Held at Wye College ( University of London ) July 1955. Butterworths scientific publications, 1956.