DJVU PDF Grima, J.A. 1986, "Discourse factors contributing to the understanding of a zero pronoun in a passage From the Phraraatchawicaan", in A Conference on Thai Studies In Honor of William J. Gedney, ed. R.J. Bickner et al., Ann Arbor, Michigan, pp. 159-170. Center for South and Southeast Asian studies, the University of Michigan. cite.