TY  - BOOK
AU  - Kelly Paul
AU  - Matthews Gordon
TI  - Non-Euclidean,hyperbolic plane: its structure and consistency
U1  - 516.9 
PY  - 1981///
CY  - N Y
PB  - Springer Verlag
KW  - Hyperbolic plane
KW  - Non-Euclidean geometry
ER  -