P. Rybski

Interstellar absorption lines in the galaxy NGC 1705

D. York, W. Wamsteker, J. Blades, 1990 .

The chemistry of galaxies. I. The nature of giant extragalactic H II regions.

G. A. Shields, M. McCall, G. Shields, 1985 .

Type II supernova 1979c in M100 and the distance to the Virgo cluster

D. Branch, A. Uomoto, B. Wills, 1981 .

CALCIUM CHLORIDE IN THE SPECTRA OF CARBON EMISSION LINE STARS

P. Rybski, 1973 .

The Spectral Classification of Southern Carbon Stars

P. Rybski, 1972 .

Observations of faint comets at McDonald Observatory: 1978-1980

A. Cochran, E. Barker, P. Rybski, 1981 .