TY  - DATA
AU  - Braver, Seth
TI  - Lobachevski illuminated 
T2  - Spectrum, 
SN  - 9780883859797 (online)
KW  - Geometry, Non-Euclidean
KW  - Mathematics
KW  - Parallels (Geometry)
N1  - Includes bibliographical references (pages 197-198) and index
UR  - https://doi.org/10.5948/UPO9780883859797
ER  -