Hobson, E. W. <br/><br/>
A treatise on plase trigonometry 

<br/><br/> Mp Means Mathematics Pure in A to Z Page 436-449 (Acc. No.Mp1-Mp405) and Page 628-630 (Acc. No.Mp406-486) 
<br/><br/><label>Dewey Class. No.: </label>Mp54