- document
- Weitendorf, Ernst August (author) report 1977
- document
- Weitendorf, Ernst August (author) report 1976
- document
- Chljupin, A.I. (author), Weitendorf, E.A. (author) report 1976
- document
- Chljupin, A.I. (author), Weitendorf, E.A. (author) report 1976
- document
- Weitendorf, Ernst August (author) report 1973
- document
- Weitendorf, Ernst August (author) report