Does any body know the email address or fax number of Professor MARC KATZ , ingallilsvagen 15, 656 38 KARLSTAD , SWEDEN I shall be very much obliged, Cordially, Bharat Gupt Associate Professor, Delhi Univ. PO BOX 8518 , ASHOK VIHAR , DELHI 110052 , INDIA tel:724-1490 , fax 741-5658 bharatgupt at vsnl.com webpage: http://personal.vsnl.com/bharatgupt/