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By "Wren, R. C. (Richard Cranfield), 1864-1931"
Potter's cyclopaedia of botanical drugs and preparations / by R.C. Wren.
By: Wren, R. C. - Holmes, Edward Morell,
Edition: 2nd ed. / with additions by E. M. Holmes.
Publication info: London :Potter & Clarke,
Contributed by: University of California Libraries (archive.org)
Potter's cyclopedia of botanical drugs and preparations / by R. C. Wren.
By: Wren, R. C.
Publication info: London :Potter & Clarke,[1900-1950?].
Contributed by: Gerstein - University of Toronto (archive.org)