A Course of Pure Mathematics
by G.H. Hardy, M.A., F.R.S., Cambridge University Press, 1908-1944

Advanced Algebra
by Professor F.W. Levi, University of Calcutta. 1942

Cartesian Tensors
by Harold Jeffreys, M.A., D.Sc., F.R.S. Cambridge University Press, 1931

Computational Mathematics for Differential Equations
by Professors N.V. Kopchenova & I.A. Maron. MIR Publishers, Moscow, 1975

Determinants & Matrices
by Dr. R. Kochendörffer, Teubner. Leipzig, 1961

Differential & Integral Calculus: Volume I and Volume II
by Professor R. Courant,
translated by E.J. McShane. Interscience Publishers, New York, 1934

Form & Mapping
by Dr. Felix Behrend, Ferdinand Hirt. Breslau, 1932

Mathematics for Berlin's Primary Schools V
by Uwe Blachnik, Monika Bunke, Walter Kirchenbecker, Karin Riecke, Ilse Wiese,
edited and arranged by Dr. Max Schröder, Professor Bernd Wurl.
Schrödel School Book Publisher, 1996
Translated by Rainer Radok

Methods of the Theory of Functions of a Complex Variable
(chapter I, II, and first part of chapter III)
by M.A. Lavrentjev & B.V. Shabat.
NAUKA, 1950
Translated by Rainer Radok

Numbers & Functions
by Dr. Artur Morgenstern, Ferdinand Hirt. Beslau, 1933

Numerical Analysis
by Professors R.J. Hosking & R. Radok. Bangkok, 2000

Partial Differential Equations of Physics
by Professor Arnold Sommerfeld, Akademische Verlagsgesellschaft Geest & Portig. Leipzig, 1945

Real Numbers & Fascinating Fractions
based on N.M. Beskin's work with the title Fascinating Fractions
translated by V.I. Kisin. MIR Publishers, Moscow, 1986

Treatise of Physics
by Arnold Berliner & Julius Springer. Berlin, 1935

3193 Problems in Mathematical Analysis with Hints and Answers
by Baranenkov, B. Demidovich, V. Efimenko, S. Kogan, G. Lunts, E. Porshneva, E. Sycheva, S. Frolov, R. Shostak, A. Yanpolsky,
edited by B. Demidovich, translated by G. Yankovsky.
Peace Publishers, Moscow, 1964