GRONINGEN ORIENTAL STUDIES VOLUME XX Published under the auspices of the J. Gonda Foundation, Royal Netherlands Academy of Arts and Sciences Editor H.T. Groningen Editorial Board H.W. Bodewitz . D.D.S. Goodall H. Isaacson . G.J. Meulenbeld Advisory Board C. Caillat, Paris· J. Ensink, Groningen R. F. Gombrich, Oxford. H.C. Heesterman, Leiden D. Shulman, Jerusalem . Ch. Vaudeville, Paris J. Williams, Berkeley - ..