BIRKHOFF, GEORGE DAVID.
Basic geometry, by George David Birkhoff & Ralph Beatley. Prelim. print. NM: p. 137-200.
BIRKHOFF, GEORGE DAVID. Basic geometry, by George David Birkhoff & Ralph Beatley. Prelim. print. NM: p. 137-200. © 7Jan41; AA356071. Scott, Foresman. & Co. (PWH); 4Dec68; R450185.
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