Gabriel, P. <br/><br/>
Calculus of fractions and homotopy theory / 
P. Gabriel and M Zisman 
 - Berlin :  Heidelberg-Verlag,  1967 
 - x, 168 p. :  ill. ;  23 cm. 
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label> DM 46.00 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Fraction<br/>Homotopy theory<br/>Set theory
<br/><br/><label>Dewey Class. No.: </label>512.86