TY  - BOOK
AU  - Steen,S.W.P.(Stourton William Peile).
TI  - Mathematical logic: with special reference to the natural numbers 
SN  - 0521080533
PY  - 1972///
CY  - London
PB  - Cambridge University Press
KW  - Logic, Symbolic and mathematical
KW  - Numbers, Natural
N1  - Bibl. p. 621-630. and index
ER  -