Essentials of Plane Trigonometry
by Rosenbach, Whitman and Moskovitz
Hardcover 1950 Ginn and Company (The Athenaeum Press)
Presumed 1st Edition
No Dust Jacket

Good condition.  Green cloth boards show general wear.  Front cover has a number '3' drawn on it in ink.  Previous owner information on front facing end page in ink; assignments and math in pencil on front and back end pages.  Pocket affixed to back end page contains 2 cards.  One has Proportional Parts, Trigonmetric Tables, and Inverse Functions.  The other is to be used as a protractor and ruler.