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Hernon, P.; McClure, C.R.: Quality of data issues in unobtrusive testing of library reference service : recommendations and strategies (1987)
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- Source
- Library and information science research. 9(1987), S.77-93
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Hernon, P.; McClure, C.R.: Library reference service : an unrecognized crisis - a symposium (1987)
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Hernon, P.; McClure, C.R.: Unobtrusive reference testing : the 55 percent rule (1986)
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- Source
- Library journal. 111(1986) no.7, S.37-41