MManuale IHWManuale IHWde Stephen J. EdbergEdiciones (1)Manuale IHW (1985)Astronomia · italianoMás obras de Stephen J. EdbergObserving Comets Asteroids Meteors And The Zodiacal LightOObserving EclipsesObserving EclipsesRResearch Amateur Astronomy. Proceedings of the Symposium on Research Amateur Astronomy. Proceedings of the Symposium on Research Amateur Astronomy 7 - 12 July 1991 La Paz, Baja California Sur, Mexiko.
RResearch Amateur Astronomy. Proceedings of the Symposium on Research Amateur Astronomy. Proceedings of the Symposium on Research Amateur Astronomy 7 - 12 July 1991 La Paz, Baja California Sur, Mexiko.
