Mode of access: Internet from the USACE web site. Address as of 11/12/2008: http://www.usace.army.mil/publications/eng-pamphlets/ep870-1-59/entire.pdf; current access available via PURL.
Note
Title from title screen (viewed Nov. 12, 2008).
"Dr. Paul K. Walker conducted this tape-recorded interview"--Page 3.