Groetsch,C.W. <br/><br/>
Generalized Inverses of Linear Operator  representation and approximation 
by  C.W. Groetsch 
 - new york  marcel dekker,inc  1977 
 - viii,165p. 
<br/><br/><label>ISBN: </label>0-8247-6615-6 
<br/><br/><label>Dewey Class. No.: </label>512.72  / GRO/G