The Elementary School Sciences Program, level C modules 1, II, III, & IV. - Biological Sciences Curriculum Study (Philadelphia, PA J. B. Lippincott, 1977)
Mod.1 : Investigating order and variation in humans -- Mod.2 : Investigating orders and variation in nonliving things -- Mod.3 : Order and variation in plants -- Mod.4 : Investigating order and variation in animals.
Keywords: Science -- Study and teaching (Elementary) -- Activity programs