Postcard and Letter The author (Heinz) tells about unfriendly weather in 1987 and about his ten papers for different issues. He thanks for the addressee's papers. The authors (Heinz and Maria) congratulate on Christmas and a New Year 1988. Date: 20.12.1987(?) Original document language: English Persons: Friedrich L. Bauer Addressee: Andrei Petrovich Ershov
