by Carr, P.D., Kowal, C.T., Mulich, T.J., Whittenburg, K., Wishnefsky, B., Posner, A.S.
Published in Acta astronautica (1999)

by KOWAL, CHARLES T.
Published in Publications of the Astronomical Society of the Pacific (01.10.1969)

by KOWAL, C. T., ZWICKY, F., SARGENT, W. L. W., SEARLE, L.
Published in Publications of the Astronomical Society of the Pacific (01.08.1974)

by KOWAL, C. T., SARGENT, W. L. W., HUCHRA, J.
Published in Publications of the Astronomical Society of the Pacific (01.06.1975)

by KOWAL, C. T., ZWICKY, F., SARGENT, W. L. W., SEARLE, L.
Published in Publications of the Astronomical Society of the Pacific (01.08.1973)

by KOWAL, C. T., SARGENT, W. L. W., SEARLE, L., ZWICKY, F.
Published in Publications of the Astronomical Society of the Pacific (01.12.1972)

by KOWAL, C. T., SARGENT, W. L. W., ZWICKY, F.
Published in Publications of the Astronomical Society of the Pacific (01.06.1971)

by KOWAL, C. T., SARGENT, W. L. W., ZWICKY, F.
Published in Publications of the Astronomical Society of the Pacific (01.06.1970)