TY  - BOOK
AU  - Bonola,Roberto
AU  - Bolyai,Janos
AU  - Lobachevskii,N.I.
TI  - Non euclidean geometry: a critical and historical study of its developments 
AV  - QA685 B835
PY  - 1955///
CY  - New York
PB  - Dover
KW  - Geometría no euclidiana
N1  - "With a suppl. containing the George Bruce Halsted translations of The science of absolute space, by John Bolyai [and] The theory of parallels, by Nicholas Lobachevski"
ER  -