| Volume 19 Number 1 | 1990 |
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| 1 |
Introduction Janet A. Mattei |
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| 4 |
Papers in the Proceedings of the First European Meeting of the AAVSO |
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| 5 |
DK Hydrae - A Neglected Eclipsing Binary Gerald Samolyk |
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| 8 |
EK Comae Berenices: A W UMa Star with Short Period Jiři Borovička |
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| 10 |
The Accurate Period of GX Aurigae Jiři Borovička |
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| 12 |
T Period Changes in the Eclipsing Binaries DG Lacertae and MZ Lacertae Jindřich Šilhán |
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| 17 |
Light-Time Effect in Eclipsing Binaries Marek Wolf |
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| 20 |
Photometric and Spectrographic Observations of Spica Liu Zongli, Sterken, C. |
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| 23 |
Request for Photometry of Algols J. R. W.Heintze |
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| 28 |
High and Low Stages of T CrB T. Iijima |
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| 33 |
The Light Curve of the R Coronae Borealis Star NSV 6708 (V854 Centauri) and the Accuracy of Visual Estimates W. A. Lawson, P. L. Cottrell, F. M. Bateson |
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| 37 |
Supernova 1989B in M66: An Unusual Type I Supernova? Stefan Korth |
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| 40 |
Photometry of the Suspected Cataclysmic Variable PG0900+401 N. A. Lipunova, S. Yu. Shugarov |
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| 43 |
Photometric Variations of AS296 C. Blanco |
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| 47 |
Some Results of Hungarian Variable Star Observers Attila Mizser, Károly Szatmáry, István Tepliczky |
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| 52 |
Pulsating Variable Stars in Binary Systems Károly Szatmáry |
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| 57 |
The Ongoing Photometric Campaign on BW Vulpeculae C. Sterken, G. Busarello, M. Dumont, S. Ferrand, J. C. Misson, J. Remis, Liu Zongli, A. Pigulski |
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| 60 |
Visual Observations of XY Lyrae and CH Cygni Jerzy Speil, Zamek Ksiaz |
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| 65 |
Middle B-Type Star Variables J. M. Le Contel, D. Le Contel |
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| 70 |
A Database for Times of Minima of Eclipsing Binaries Dieter Lichtenknecker |
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| 73 |
Statistical Analysis of the Semiregular Variable AR Cephei Arūnas Kučinskas |
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| 76 |
Some Variable Stars Observed by the Scandinavian Variable Star Observers Aarre Kellomäki |
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| 81 |
Diameter Measurements and Imaging of Mira Variables Margarita Karovska |
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| 85 |
Off-Centering Errors in Multiaperture Photoelectric Photometry of Galaxies G. Busarello, G. Longo, C. Sterken |
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| 90 |
An Innovative Telescope Design for CCD Photometry John E. F. Baruch |
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| 94 |
An Unusual Photoelectric Photometer for Small Telescopes Hideo Satoh |
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| 98 |
Software Tools for the Variable Star Observer J. Gunther |
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| 102 |
The Status of Sunspot Cycle 22 Through July 1990 Peter O. Taylor |
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