Sets and Boolean algebra /
Rueff, Marcel.
Jeger, Max.
Howson, A. G.(Albert Geoffrey),1931-
London Allen & Unwin
1970
Pbk. 25/-. sbn 04 510031 4
Originally published as 'Menge, Boole'-scher Verband und Mass im Schulunterricht'. Luzern: Räber, 1966
bibl p190-191
Algebra, Boolean.
Set theory.