Projects for a healthy planet simple environmental experiments for kids

Projects designed to help us understand causes of pollution, to protect our resources, and to create environmentally friendly products.

Библиографические подробности
Главный автор: Levine, Shar 1953-
Другие авторы: Chui, Terry, Grafton, Allison
Формат:
Язык:English
Опубликовано: New York Wiley c1992.
Предметы: