000
00273nam a2200109 4500
008
160616s 000 0
245
_a
Simple non-euclidean geometry and its physical basis
100
_a
Yaglom, I.M
500
_a
B6 L92
942
_c
BK
_2
BK1222
080
_a
511 YAG
999
_c
1222
_d
1222