Gilbert, Robert P. and Buchanan, James L. <br/><br/>
First order elliptic systems; a function theoretic approach   

 - New York  Academic Press  1983 
 - xi, 281p. Index, Bibl. 
 - Mathematics in Science and Engineering   v. 163 .
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<br/><br/><label>Dewey Class. No.: </label>515.35  / G465.FO