The Illustrated encyclopedia of knowledge (New York : Marshall Cavendish, 1978)
v. 1, v. 2, v. 3, v. 4, v. 5, v. 6, v. 7, v. 8, v.9, v. 10, v. 11, v.12, v. 13, v. 14, v. 15, v. 16, v. 17, v. 18, v. 19, v. 20.
Originally published under title: Tree of knowledge.
Includes index.
Keywords: Children's encyclopedias and dictionaries