Mathematical proof : an elementary approach
Hallerberg, Arthur E.
Mathematical proof : an elementary approach - - New York Hafner Press, 1974 - viii,104 p. 27 cm - .
0-02-845690-42
Proof theory
517.1 Hal
Mathematical proof : an elementary approach - - New York Hafner Press, 1974 - viii,104 p. 27 cm - .
0-02-845690-42
Proof theory
517.1 Hal