eurypterid horizon in the Niagara formation of Ontario
By: by M.Y. Williams.
Series: Museum bulletin -- no. 20; Geological series -- no. 29; Museum bulletin (Ottawa, Ont.) -- no. 20.; Bulletin (National Museum of Canada) -- no. 29.
Publisher: Canada Geological Survey
Published: 1915
Place of publication: Ottawa
Language: eng
Number of pages: 21
Subjects: Eurypterida.; Paleontology -- Ontario.
Notes: Cover title.  Bibliographical footnotes.