Three kinds of rock
Subtitle: additional information for leaders.
Contributors: Washington State University. Cooperative Extension Service.
Series: Extension mimeo -- 2882.; Extension mimeo (Washington State University. Cooperative Extension) -- 2882.
Publisher: Cooperative Extension Service, College of Agriculture, Washington State University
Published: 1970
Place of publication: [Pullman
Language: eng
Notes: Cover title.

"Washington 4-H Natural Resources Project."

"September 1970."

"EM 2882."