Books by Ralph L. Knowles:
Books in the extended shelves:
![[X-Info]](https://onlinebooks.library.upenn.edu/infouc.gif)
Knowles, Ralph L.: Solar envelope concepts : moderate density building applications (University of Southern Calilfornia, School of architecture ;, 1980), also by Richard D. Berry, United States. Dept. of Energy, and Solar Energy Research Institute (page images at HathiTrust)- Knowles, Ralph L.: Solar envelope concepts : moderate density building applications : final report, April 1980 (Solar Energy Information Data Bank ;, 1980), also by Richard D. Berry and Solar Energy Information Data Bank (U.S.) (page images at HathiTrust)
Find more by Ralph L. Knowles at your library, or elsewhere.