Authors: Zachartas, N Urban, SE Zacharias, MI Hall, DM Wycoff, GL Rafferty, TJ Germain, ME Holdenried, ER Pohlman, JW Gauss, FS Monet, DG Winter, L

Citation: N. Zachartas et al., The first US Naval Observatory CCD Astrograph catalog, ASTRONOM J, 120(4), 2000, pp. 2131-2147

Authors: Zacharias, N Zacharias, MI Urban, SE Hog, E

Citation: N. Zacharias et al., Comparing Tycho-2 astrometry with UCAC1, ASTRONOM J, 120(2), 2000, pp. 1148-1152

Authors: Zacharias, N Zacharias, MI

Citation: N. Zacharias et Mi. Zacharias, The twin astrographic catalog on the Hipparcos system, ASTRONOM J, 118(5), 1999, pp. 2503-2510

Authors: Zacharias, N Zacharias, MI Hall, DM Johnston, KJ de Vegt, C Winter, L

Citation: N. Zacharias et al., Accurate optical positions of extragalactic radio reference frame sources, ASTRONOM J, 118(5), 1999, pp. 2511-2525

Authors: Zacharias, N Zacharias, MI De Vegt, C

Citation: N. Zacharias et al., The second Cape Photographic Catalogue on the Hipparcos system, ASTRONOM J, 117(6), 1999, pp. 2895-2901