Trignometry;  plane and spherical/ 

 - [New Tork]:  Mcgraw Hill,  [19..]. 
 - xi,125p.:  ill.;  20cm 
<br/><br/><label>Source: </label>B-20497 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Trignometry
<br/><br/><label>LC Class. No.: </label>QA531  / .N55