Mathematics

LAMBERT, JOHANN HEINRICH [NON-EUCLIDEAN GEOMETRY].

(Berlin, Haude & Spener, 1770).

RUSSELL, BERTRAND.

London, George Allen & Unwin, (1950).

LORENSEN, PAUL.

Berlin, Springer, 1955.

BOCHNER, SALOMON.

Princeton, University Press, 1966.

BELL, E.T.

N.Y., McGraw-Hill, 1940.

SCHOLZ, HEINRICH & GISBERT HASENJAEGER.

Berlin & Göttingen & Heidelberg, Springer-Verlag, 1961.

BETH, E. W.

Paris, Gauthier-Villards, 1950.

BETH, E. W.

Paris, Gauthier-Villards, 1955.

WANG, HAO. & ROBERT NAUGHTON.

Paris, Gauthier-Villars, 1953.

KOWALEWSKI, GERHARD.

Lpz., 1933.

JACOBI, C.G.J.

(Berlin, G. Reimer, 1829).

RUTHERFORD, D.E.

Edinborgh a. London, Oliver & Boyd, (1965).

POINCARÉ, HENRI.

(Berlin, Uppsala & Stockholm, Paris, Almqvist & Wiksell, 1897).

OTTO, J.C.F.

Berlin, Jonqs Verlagsbuchhandlung, 1833.

STEEN, ADOLPH.

Kjøbenhavn, Reitzel, 1879.

HARKNESS, JAMES and FRANK MORLEY.

London a. N.Y., Macmillan and Co., 1893.

ACKERMANN, WILHELM.

Berlin, Julius Springer, 1925.

DENBOW, CARL H. AND VICTOR GOEDICKE.

N.Y., Harper & Row, (1959).