Nand, Brahma. <br/><br/>
Spherical Harmonics and Partial Differential Equations 
Brahma Nand, B.S. Tyagi & Bhu Dev Sharma 
 - 8th ed. 
 - Meerut :  Kedar Nath Ram Nath, 
 - 168 p.:  ill.; 
<br/><br/><label>Dewey Class. No.: </label>515.35  / NAN/SPH