Pangeometry
Nikolaĭ Ivanovich Lobachevskiĭ
Nikolaĭ Ivanovich Lobachevskiĭ Athanase Papadopoulos. Nikolai I. Lobachevsky
Pangeometry Edited and translated by Athanase PapadopouLos This One 1KBE-
AXU-8FKC European ^^Mathematical vSbciety Editor: Athanase Papadopoulos ...