Clapp, V. W. (1956). Bibliographical Services throughout the World. First and Second Annual Reports and Third Annual Report.
Styl ChicagoClapp, Verner W. Bibliographical Services Throughout the World. First and Second Annual Reports and Third Annual Report. 1956.
Citace podle MLAClapp, Verner W. Bibliographical Services Throughout the World. First and Second Annual Reports and Third Annual Report. 1956.
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