Crowder, Norman A. <br/><br/>
Trigonometry :   a practical course / 
by Norman A. Crowder and Grace C. Martin.  
 - 1st ed. 
 - Garden City, N.Y. :  Doubleday,  1961. 
 - IX, 250 p. :  ill. ,  22 cm. 
 - A Tudor text .
<br/><br/> Includes Indexes 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Trigonometry--Problems, exercises, etc.<br/>Programmed instruction.
<br/><br/><label>Dewey Class. No.: </label>516.24  / CRT 1961