TY  - BOOK
AU  - Gabriel,P.
AU  - Zisman,M.
TI  - Calculus of fractions and homotopy theory
U1  - 512.86 
PY  - 1967///
CY  - Berlin
PB  - Heidelberg-Verlag
KW  - Fraction
KW  - Homotopy theory
KW  - Set theory
N1  - Includes index
ER  -