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References
- 1 2 3 4 Simons, Martin (2005). Sailplanes 1965-2000 (2nd revised ed.). Königswinter: EQIP Werbung & Verlag GmbH. pp. 52. ISBN 3-9808838-1-7.
- 1 2 3 Taylor, John W. R. (1989). Jane's All the World's Aircraft 1989-1990. London: Jane's Information Group. p. 630. ISBN 0-7106-0896-9.
- 1 2 3 4 Lambert, M. (1991). Jane's All the World's Aircraft 1991-1992 . London: Jane's Information Group. pp. 614, 618. ISBN 0-7106-0965-5.
- ↑ Simons (2005), p.135