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\F2\CARTIFICIAL INTELLIGENCE LABORATORY
\CCOMPUTER SCIENCE DEPARTMENT
\CSTANFORD UNIVERSITY
\CSTANFORD, CALIFORNIA 94305
\F0



					September 6, 1973


Professor Z. Pawlak
Computation Centre
Polish Academy of Sciences
P. O. Box 22
00-901 Warsaw, PKiN, 
Poland


Dear Professor Pawlak:

\J	Thank-you for your letter informing me about the Stefan Banach International
Mathematical Centre and your proposed semester of guest lecturers.  My sincere
apologies for the long time lag in response.  Your letter was accidentally mislaid,
and I have just now come upon it.  Unfortunately, I will not be able to come to
Poland to participate in this program during this period.\.


					Sincerely yours,



					John McCarthy
					Professor of Computer Science
					Director, Artificial Intelligence Laboratory