TY  - BOOK
AU  - W. Sierpinski
AU  - Klein, F. 
TI  - Congruence of sets and other monographs
U1  - 517.521 SIC 
PY  - 1953///
CY  - New York
PB  - Chelsea pub.
KW  - Calculus
N1  - Includes illus
ER  -