Hirschman, I. I.  1922- <br/><br/>
The decomposition of Walsh and Fourier series/ 
by I. I. Hirschman. 
 - Providence, R.I.:  American Mathematical Society,  1955. 
 - 65 p.:  26 cm. 
 - Memoirs of the American Mathematical Society;  no. 15. .
<br/><br/> Cover title. 
<br/><br/>Bibliography: p. 64-65. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Fourier series.<br/>Harmonic functions.