Welchons, A. M. Trigonometry with tables, [electronic resource] / by A.M. Welchons and W.R. Krickenberger.. — Boston, : Ginn, [1957]. — 337, 84, 24 p. : illus. 24 cm.



LCCN: 57003451

Subjects--Topical Terms:
Trigonometry.

LC Class. No.: QA531 / .W33 1960

Dewey Class. No.: 514