Thomas, Joseph Miller,  1898- <br/><br/>
Systems and roots / 
Joseph M Thomas 
 - Richmond, Va. :  William Byrd Press,  1962. 
 - 123 p. ;  24 cm. 
<br/><br/> Includes index 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Differential equations, Partial.
<br/><br/><label>Dewey Class. No.: </label>515.3  / THS 1962