Freund, John E..
A Modern Introduction to Mathematics / Freund John E.. - Englewood Cliffs, N.J. : Prentice-Hall, 1956. - 543 s.; 25 cm.
A Modern Introduction to Mathematics / Freund John E.. - Englewood Cliffs, N.J. : Prentice-Hall, 1956. - 543 s.; 25 cm.