TY  - BOOK
AU  - Steen,S.W.P.
TI  - Mathematical logic: with special reference to the natural numbers 
SN  - 0521080533 :
U1  - 164 
PY  - 1972///
CY  - Cambridge
PB  - The University Press
KW  - Logic, Symbolic and mathematical
KW  - Numbers, Natural
N1  - Includes bibliographical references and index
ER  -