Search Results       Your search for [author]Wren, R. C. (Richard Cranfield), 1864-1931. returned 1 record.           Potter's new cyclopaedia of botanical drugs and preparations. by Wren, R. C. (Richard Cranfield), 1864-1931.; London: Pitman for Potter & Clarke, 1956. Subject: Materia medica, Vegetable -- Encyclopedias; Drugs -- Encyclopedias.          Add to Book Cart Relevance: 42.63%