TY  - BOOK
AU  - Harper,John R.
TI  - Secondary cohomology operations
T2  - Graduate studies in mathematics,
SN  - 0821831984 (papel libre de acido)
AV  - QA612.3 H35
U1  - 514/.23 21
PY  - 2002///
CY  - Providence, Rhode Island
PB  - American Mathematical Society
KW  - Teoría homológica
ER  -