· of periodicals by JAMES D. STEWART, MURIEL E. HAMMOND and ERWIN SAENGEN (London, 1955 onward)....
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· of periodicals by JAMES D. STEWART, MURIEL E. HAMMOND and ERWIN SAENGEN (London, 1955 onward). For publications in periodicals to be found in the libraries of the U.S.A. and Canada,