Direct methods, macromolecular crystallography and crystallographic statistics : papers presented at the international school jointly organized by the Department of Crystallography and Biophysics, University of Madras and Physics Department, Indian Institute of Technology, Madras, December 9-19, 1985 ; edited by H. Schenk, A.J.C. Wilson, S. Parthasarathy ; [sponsored by] Commission on Crystallographic Teaching of the International Union of Crystallography in cooperation with Committee on Science and Technology in Developing Countries.