Schöenfelder, V

Collmar, W

Diehl, R

Lichti, G

Much, R

Steinle, H

Strong, A

Varendorff, M

Bloemen, H

de Boer, H

der Herder, JW

Hermsen, W

Kuiper, L

Swanenburg, B

de Vreis, C

Connors, A

Lockwood, J

Macri, J

McConnell, Mark

Morris, D

Ryan, J

Stacy, G

Webö, W

Bennett, K

Busetta, M

Winkler, C

September 1991

Bulletin of the American Astronomical Society  Journal