TY  - BOOK
AU  - Arkowitz,Martin
AU  - Curjel,Caspar R.
TI  - Groups of homotopy classes: rank formulas and homotopy-commutativity 
PY  - 1967///
CY  - Berlin, New York
PB  - Springer-Verlag
KW  - Homotopy theory
KW  - Group theory
N1  - Bibliography: p. 34-35
ER  -