Pittie, H. V. <br/><br/>
Characteristic classes of foilations 
by H .V. Pittie 
 - London  Pitman Publishing  c1976 
 - [4],107p.;  24cm.- 
 - Research notes in mathematics ; no.10 .
<br/><br/><label>Dewey Class. No.: </label>514.224  / PIT