his quick bibliography is a compilation of recently (1998 onward) published peer-reviewed articles describing original research with citations that may be of interest to other investigators working in any of the GPS & GLONASS fields. Journal titles are abbreviated following the nomenclature adopted by their respective editors. Titles of new books (•) and conference proceedings (•) that include a significant number of chapters and/or articles dealing with GPS and GLONASS are also listed in this bibliography. Articles, primarily appearing in trade journals, containing interspersed advertisements are only identified by their first page number followed by the symbol +. Contributions with more than five authors will be referenced under the first author name and the extension et al. Acker, Y. et al. 1998. Virgo GPS network: Survey and data processing, Boll. Geod. Sci. Affini, 57(4), 385-404. Al-Gaadi, K.A. and P.D. Ayers. 1998. Assembling real-time DGPS—Testing and investigating factors that affect its accuracy, Applied Engineering in Agriculture, 14(6), 659-665. Anzidei, M. et al. 1998. Utilizzo della rete GPS IGM95 per lo studio delle deformazioni cosismiche dei terremoti umbro-marchigiani del 26 settembre 1997, Boll Geod. Sci. Affini, 57(3), 325-336. Anzidei, M. and A. Galvani. 1999. Monitoring the Alban Hills (Rome, central Italy) volcanic complex by GPS, Boll. Geod. Sci. Affini, 58(1), 1-15. Asher, M.S. 1998. Proposed improvements in precise GPS attitude determination using predetect data, gyro data, and redundant antennas, Advances in the Astronautical Sciences, 100(1), 367-376.