TY  - BOOK
AU  - Iversen,Birger
TI  - Hyperbolic geometry
T2  - London Mathematical Society student texts
SN  - 0521435080
PY  - 1992///
CY  - Cambridge
PB  - Cambridge University Press
KW  - Geometry, Hyperbolic
N1  - Includes bibliographical references (p. 292-294)
ER  -