C. with STEVEN ERLANGE. http://ezproxy.library.wwu.edu/login?url=http://proquest.umi.com/pqdweb?did=117880463&Fmt=7&clientId=9320&RQT=309&VName=PQD, (Mai 2002)
W. BROAD, und D. JOHNSTON. http://ezproxy.library.wwu.edu/login?url=http://proquest.umi.com/pqdweb?did=118091975&Fmt=7&clientId=9320&RQT=309&VName=PQD, (Mai 2002)
A. COWELL, und J. GREENBERG. http://ezproxy.library.wwu.edu/login?url=http://proquest.umi.com/pqdweb?did=119190033&Fmt=7&clientId=9320&RQT=309&VName=PQD, (Mai 2002)
R. TONER, und J. ELDER. http://ezproxy.library.wwu.edu/login?url=http://proquest.umi.com/pqdweb?did=117623483&Fmt=7&clientId=9320&RQT=309&VName=PQD, (Mai 2002)
T. with JUDITH MILLER. http://ezproxy.library.wwu.edu/login?url=http://proquest.umi.com/pqdweb?did=117808664&Fmt=7&clientId=9320&RQT=309&VName=PQD, (Mai 2002)
T. PURDUM, und D. SANGER. http://ezproxy.library.wwu.edu/login?url=http://proquest.umi.com/pqdweb?did=117623725&Fmt=7&clientId=9320&RQT=309&VName=PQD, (Mai 2002)