Commentary on interstellar matter associated with 18 open clusters /

"September 1989"--Cover.

A new general catalogue of nebulae and clusters of stars, being the catalogue of the late Sir John F.W. Herschel.

Mode of access: Internet.

Uranography ; or, a description of the heavens; designed for academies and schools; accompanied by an atlas of the heavens, showing the places of the principal stars, clusters, and nebulæ /

Mode of access: Internet.

The future of the nation's energy utilities [microform] : implications for federal R.D.PD. : hearings before the Subcommittee on Energy Development and Applications of the Committee on Science and Technology, U.S. House of Representatives, Ninety-seventh Congress, first session, June 23, 24, 1981.

"No. 35."

Recherches astronomiques de l'Observatoire d'Utrecht.

Ceased with volume 18:2. Superseded by the Bullletin of the Astronomical Institutes of the Netherlands, Supplement series.

Operator and organizational maintenance manual including repair parts and special tool lists : radiacmeter IM-174/PD.

"July 1969."

Researches on the evolution of the stellar systems ...

v. 1. On the universality of the law of gravitation and on the orbits and general characteristics of binary stars.--v. 2. The capture theory of cosmical evolution, founded on dynamical principles and illustrated by phenomena observed in the spiral nebulae, the planetary system, the double and multiple stars and clusters and the star-clouds of the Milky way.