00331nam a2200109Ia 4500008004100000040003800041100001800079245005900097260003300156300001600189653001600205211215s9999    xx            000 0 und d  cJayakar Knowledge Resource Centre  aRedei, Laszlo 0aTheory of finitely generated communitative semi groups  bPergamon pressaLondonc1965  axii,353p p.  aMahtematics