TY  - GEN
AU  - Gabriel, Peter
AU  - Zisman, Michel
TI  - Calculus of fractions and homotopy theory
U1  - 514.24 
PY  - 1967///
CY  - Berlin; Heidelberg; New York
PB  - Springer
KW  - Topologie algebrica
N1  - Bibliografie p. 163
Index p. 165
ER  -