Related URL: http: //purl.access.gpo.gov/GPO/LPS30404.
書誌注記
Includes bibliographical references.
別の媒体に関する注記
Also available via Internet from the UNT Cybercemetery web site. Address as of 5/19/2003: http: //govinfo.library.unt.edu/ota/Ota2/DATA/1990/9005.PDF; current access available via PURL.