Resources
- Brockman , Frank C. 1968 . Trees of North America , New York : Golden Press .
- Herman , Schneider . 1965 . Science in Our World , Boston : D.C. Heath & Co. . (See chapter 9, “Plants in Our Planet” in this fifth-grade science book.)
- Howes , F. N. , ed. 1974 . A Dictionary of Useful and Everyday Plants and Their Common Names , New York : Cambridge University Press .
- Hutchins , Ross E. 1962 . This Is a Leaf , New York : Dodd, Mead & Co. .
- Jacobson , Konicek and Lauly . 1965 . Inquiring into Science , New York : American Book Co. . (See chapter, “How Are Plants Classified?”)
- Schuler , Stanley , ed. 1978 . Trees , New York : Simon & Schuster .
- Symonds , George W.D. 1963 . The Shrub Identification Book , New York : William Morrow & Co. .
- Watts , Tom . 1972 . Rocky Mountain Tree Finder , Berkeley , Calif. : Nature Study Guild .
- Zim , Herbert S. and Martin , Alexander G. 1956 . Trees , New York : Golden Press .