Neither citation nor loan demand is an adequate measure of literature use by a large community. Each is only an indicator, illuminating some aspects of use but with its own inherent bias. The joint study of several indicators gives a more balanced picture..
Share this quote
Source, in full
Penelope Earle and Brian Campbell Vickery (1969), "Social Science Literature Use in the U.K. as Indicated by Citations," Journal of Documentation 25: p. 133; As cited in Yasar Tonta, Yurdagül Ünal (2005) "Scatter of journals and literature obsolescence reflected in document delivery requests". JASIST 56(1): 84-94.