Jt y^s 3jjt m > &? '^'" f : -'^^ i-'<^,'-^ -'^^' <&r* w ? FV-f^.'* ^ i ,^A ^ THE UNIVERSITY OF ILLINOIS LIBRARY ^? ; 1^ \ i " mi s^> "' ' "" <^7 ' >v ^'"''^^-> ^T - r;--L iJK.^f^K, ^f' ^^^^^ m^w^ ' r , .; '' r A *'<^^,y' / "wiwvw i . '\ ' / v v v V'm l ^B L w* - Xi^v % ^ ./s ^ > m. 1 ** t ^ .-. v: The person charging this material is re- sponsible for its return to the library from which it was withdrawn on or before the Latest Date stamped below. Theft, mutilation, and underlining of books are reasons for disciplinary action and may result in dismissal from the University. To renew call Telephone Center, 333-8400 s^^c^im ,,, M "i i*V3te . i+'Sra* ,l^*rV! MAR 31 981 , < S I * , j .-" 1 \ I > . i 1 j ?t 't L161 O-1096 PAPERS AND PROCEEDINGS Vv<- OF THE