Reptiles

by Susan Harris

Published 1 January 1978
Describes general characteristics of reptiles with particular emphasis on turtles, tortoises, crocodiles, alligators, lizards, snakes, and tuataras.

Helicopters

by Susan Harris

Published 1 January 1979
An account of the operation, usefulness, and history of helicopters.

Gems and Minerals

by Susan Harris

Published 1 January 1980
Describes in simple language the characteristics and uses of minerals and gems.