Fish (World of Animals (Danbury, Conn.), V. 31-40.)

World War II

Insects and Other Invertebrates (World of Animals (Danbury, Conn.), V. 21-30.)

Amazing Animals of the World 2

Reformation, Exploration, and Empire, Vol. 10

Physics Matters

Inventions & inventors

Health Matters

U.S.A. Twenties

Depression America

Flash Focus

Visual Science Encyclopedia

CHINA Portrait of a People

Ancient civilizations