Janos Marffy

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Pub. Date

1984.

Description

Suggested activities illustrate the properties of air and how air can be used to make things fly.

Author

Pub. Date

1984

Description

Explains the characteristics and transmission of sound, musical and otherwise, and suggests related activities.

Pub. Date

1991.

Description

An introduction to regional geography of the world, with a map, facts, and pictures for the major regions of each continent.

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