Gardening in the tropics :
Trinidad. Department of Agriculture
Gardening in the tropics : Especially written for school gardens in Trinidad and Tobago. Based on a course of lectures delivered to elementary school teachers at the St. Clair Experiment Station in 1921. / by R.O. Williams ... - Revised edition. - Trinidad : Government Printing Office , 1933. - 2 preliminary leaves, iii, [3], 68, iip.: illustrations , diagrams ; 22 cm
Gardening in the tropics : Especially written for school gardens in Trinidad and Tobago. Based on a course of lectures delivered to elementary school teachers at the St. Clair Experiment Station in 1921. / by R.O. Williams ... - Revised edition. - Trinidad : Government Printing Office , 1933. - 2 preliminary leaves, iii, [3], 68, iip.: illustrations , diagrams ; 22 cm