@unpublished{Peirce1901-02 [c.],
author = "Charles S. Peirce",
title = "{On the Ways of Thinking of Mathematics. MS [R] 51}",
year = 1901-02 [c.],
abstract = "{Robin Catalogue:
A. MS., n.p., [c.1901-02?], pp. 1-4, with a rejected p. 3.
On the decimal and secundal systems of enumeration.
}",
keywords = "Decimal System, Secundal System",
language = "English",
note = "From the Commens Bibliography | \url{http://www.commens.org/bibliography/manuscript/peirce-charles-s-1901-02-c-ways-thinking-mathematics-ms-r-51}"
}
