Letter with russian translation Under the general agreement about an exchange of researchers between Swedish Universities and SO AN in Novosibirsk, the authors invite A.Ershov to visit Sweden during the early fall of 1971. Date: 16.06.1970 Original document language: Russian, English Authors: Carl-Erik Froeberg, Germund Dahlguist Organizations: Lund Univer., CC SB RAS Addressee: Andrei Petrovich Ershov
