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2. Bos, A., 1993, EVN Document No. 6.
3. Bos, A., Aldrich, A., & Whitney, A.R., 1996, EVN Document No. 237.
4. Canaris, J. & Aldrich, W., 1993, MkIV memo No. 225.
5. Goodman, J., 1993, MIT-Haystack Observatory, MkIV Memo No. 191.