More from this Author
Found 2 books by Richard J. Ayen

Innovative Site Remediation Technology
by James R. Donnelly, Bob Ahlert, Richard J. Ayen, Sharon R. Just, Mark Meckes, William C. Anderson (Editor)

Liquid Extraction Technologies
by Michael J. Mann, William C. Anderson (Editor), Lorne Everett, Dirk Gombert, Chester McKee, Richard P. Traver, Phillip D. Walling, Shao-Chih Way, Richard J. Ayen, Mark Meckes