Williams, R. O. 1891- School gardening in the tropics / R.O. Williams. - 3rd ed. - New York ; London : Longmans, Green & Co., c1949 [impration 1967]. - 143 p. : ill. ; 19 cm. Subjects--Topical Terms: School gardens.Gardening--Study and teaching. Dewey Class. No.: 371.61 / WIS 1967