| Volume 20 Number 2 | 1991 |
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| 130 | Photometry with Charge-Coupled Devices: Characteristics and Applications George H. East |
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| 134 | Introduction to Time-Series Photometry Using Charge-Coupled Devices Steve B. Howell |
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| 150 | CCDs in an Educational Environment Priscilla J. Benson |
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| 154 | Using the Lynxx CCD Camera on a Small Telescope for Variable Star Observations Gary P. Emerson, Stephen J. Little |
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| 157 | The Sky Over Crystal Lake George S. Mumford |
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| 159 | How Amateur Astronomers are Helping Discover the True Nature of Cataclysmic Variables Steve B. Howell |
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| 166 | Searching for the White Dwarf in Dwarf Novae Albert V. Holm, Howard Lanning, Janet Mattei, Edmund Nelan |
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| 173 | Period Hunting in Long-Term Light Curves of Cataclysmic Variables Hayley R. Richman |
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| 182 | V3890 Sagittarii Brightness Update La Tanya P. Miller |
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| 185 | Computer Animations and The Shapes of Cepheid Velocity Curves Charles A. Whitney |
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| 192 | Periodicities of Maser Emission From Variable Stars Sara A. Maene |
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| 198 | A Correlation Between Water Maser Emission and the Visual Light Curve of RX Bootis Jennifer Hedden, Priscilla J. Benson, Irene R. Little-Marenin, Robert R. Dacmus |
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| 203 | Water Maser Emission and The Visual Light Curve of R Draconis Samantha J. Osmer, Priscilla J. Benson, Irene R. Little-Marenin |
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| 208 | DH DRA: An Interesting Red Variable Dietmar Boehme |
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| 212 | V343 Cygni: A W Virginis Star with a Constant Period Laura M. Woodney, Amy R. Lesser |
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| 214 | A Recent Study of V783 Cygni Julie Cross |
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| 217 | A V801 Cygni Update Robert C. Berrington |
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| 220 | The Period of V943 Aquilae I. Discovery of a Shorter Period Elizabeth A. Fraser |
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| 223 | The Period of V943 Aquilae II. Demonstrations that the Shorter Period is Spurious Bernard V. Fallon |
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| 226 | The Period of EF Comae Berenices Amy R. Lesser |
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| 229 | A Revision of the Elements for EL Comae Berenices Laura M. Woodney |
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| 231 | The 1991 Eclipse of OW Geminorum David B. Williams, Daniel H. Kaiser |
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| 234 | Photoelectric Photometry of OW Geminorum at Phase 0.5 David B. Williams, Donald P. Pray, James E. Wood |
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| 236 | The Revised Period of V3821 Sagittarii Anna Seto |
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| 239 | MQ Serpentis, A Mystery Dorrit Hoffleit |
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| 241 | Definitive American Relative Sunspot Numbers for 1991 Peter O. Taylor |
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| 244 | Night Sky Brightness from Visual Observations II. A Visual Photometer Arther R. Upgren |
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| 248 | Adapting a 10-Inch Astrograph for Sheet Film David B. Williams |
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| 250 | Abstracts of Papers Presented at the 80th Annual Meeting of the AAVSO, Cambridge, MA, October 25-27, 1991 |
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