On natural phosphates
Subtitle: paper read by J. Lainson Wills, F.C.S., on 12 March, 1892, before the Ottawa Field-Naturalists' Club
Published: 1892
Place of publication: Ottawa; s.n
Language: eng
Number of pages: 16
Other titles: The Ottawa naturalist.
Notes: Caption title.

Reprinted from the Ottawa naturalist, v. 6, 1892-93, p. 7-22.