A contribution to the description of the fauna of the Trenton group - Raymond, Percy E. (Percy Edward), 1879-1952. (Ottawa : Thomas Mulvey, printer, 1921)
Includes bibliographical references and index.
Cover title.
At head of title: Canada. Department of Mines.
Descriptive letterpress on verso of opposite plate.
"February 17, 1921."
Keywords: Paleontology -- Ordovician; Paleontology -- Canada