Ballou, Donald H. <br/><br/>
Plane trigonometry  with tables 
Donald H. Ballou and Frederick H. Steen. 
 - Boston  Ginn  1943. 
 - vi, 123, 6, [1], 84 p.  diagrs. 
<br/><br/> "Wentworth-Smith trigonometric and logarithmic tables" on card laid in.  Preliminary editions lithoprinted at Ann Arbor, 1940 and 1941.  "Answers" : 6 [1] p. following p. 123. 
<br/><br/><label>LCCN: </label>43013994  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Trigonometry, Plane.
<br/><br/><label>LC Class. No.: </label>QA533  / .B2 1943