C. v . durell, m.a. <br/><br/>
Advanced trigonometer  C. v . durell, m.a. , A. robson, m.a. 

 - London  G. bell and sons, ltd  1953 
 - viii, 335 p.  ill.  22 cm 
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<br/><br/><label>Subjects--Topical Terms: </label><br/>MCE
<br/><br/><label>Dewey Class. No.: </label>516.24  / DUR