Source materials - Appendix F

Miniature environment: an environmental education guidebook

U.S. Department of Interior

Bureau of Outdoor Recreation

Division of Information, Room 4241

Washington, D.C. 20240, USA

One hundred science experiments for everyone

UNESCO

Doubleday & Co., Inc.

Garden City, N.Y., USA

Ranger Rick's Nature Magazine (monthly)

National Wildlife Federation

1412 16th Street N.W.

Washington, D.C. 20036, USA