Clapp, V. W. (1956). Bibliographical Services throughout the World. First and Second Annual Reports and Third Annual Report.
استشهاد بنمط شيكاغوClapp, Verner W. Bibliographical Services Throughout the World. First and Second Annual Reports and Third Annual Report. 1956.
MLA استشهادClapp, Verner W. Bibliographical Services Throughout the World. First and Second Annual Reports and Third Annual Report. 1956.
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