by Lasker, Barry M., Sturch, Conrad R., Lopez, Carlos, Mallamas, Anthony D., McLaughlin, Steven F., Russell, Jane L., Wisniewski, Wieslaw Z., Gillespie, Bruce A., Jenkner, Helmut, Siciliano, Elizabeth D., Kenny, Deborah, Baumert, John H., Goldberg, Alan M., Henry, Gregory W., Kemper, Edward, Siegel, Michael J.
Published in The Astrophysical journal. Supplement series (01.09.1988)