00307nam a2200121 a 450000500170000002000150001708200190003210000190005124500250007026000340009530000220012949000340015120251203091555.0  a0198535805  a512.2,bD, eve  aEvens, Leonard  aCohomology of groups  aOxfordbClarendon Pressc1991  axii, 160p, 22 cm.  aOxford Mathematical monograph