Darrow, K. R. P. (1976). Appropriate technology source book: For tools and techniques that use local skills, local resources, and renewable sources of energy (2nd ed.). Volunteers in Asia.

Darrow, Ken Rick Pam. Appropriate Technology Source Book: For Tools and Techniques That Use Local Skills, Local Resources, and Renewable Sources of Energy. 2nd ed. California: Volunteers in Asia, 1976.

Darrow, Ken Rick Pam. Appropriate Technology Source Book: For Tools and Techniques That Use Local Skills, Local Resources, and Renewable Sources of Energy. 2nd ed. Volunteers in Asia, 1976.