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Rothstein, Samuel 2014-12-05T17:01:45Z 2014-12-05T17:01:45Z 1954 1954 Made available in DSpace on 2014-12-05T17:01:45Z (GMT). No. of bitstreams: 1 0009128.pdf: 19200914 bytes, checksum: e671be402a8ee03f3b0f5b4a4177d9de (MD5) Previous issue date: 1954 Embargo set by: Seth Robbins for item 57574 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs Open Restriction set for Item 57574 on 2019-12-06T18:19:58Z with date null by astein@illinois.edu. Open Restriction set for Item 57574 on 2019-12-06T18:20:00Z with date null by astein@illinois.edu. Access restrictions removed due to expiration of copyright as determined by Ayla Stein Kenfield. Access restrictions removed by astein@illinois.edu on 2019-12-06 Open 288 p. Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1954. http://hdl.handle.net/2142/57387 (UMI)AAI0009128 eng Library Science The Development of Reference Services in American Research Libraries text Library Science Library Science University of Illinois at Urbana-Champaign Dissertation Ph.D.