TY  - BOOK
AU  - Hansen, Vagn Lundsgaard.
TI  - Braids and Coverings: selected topics 
SN  - 0521384796 (hbk.)
PY  - 1989///
CY  - Cambridge
PB  - Cambridge University Press
KW  - Braid theory
KW  - Covering spaces
KW  - Topology
N1  - Includes index; Includes bibliographical references
ER  -