Note 4 — I THE TOMATO IS A GREAT FOOD AND CROP PLANT
Reading edition
Howlett, F. S. Use of chemicals to stimulate fruitfulness in tomatoes. Veg. Growers Asso. of America Rept. 1941, pp. 203-214. 1941.
Zimmerman, P. W. and Hitchcock, A. E. Formative effects induced with B-Naphthoxyacetic acid. Contribution from Boyce Thompson Inst. Vol. 12 #1, April-June, 1941.