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∂CSL Dr. D. E. Rosenheim, Director↓IBM Research Laboratory, San Jose
↓5600 Cottle Road↓San Jose, CA 95193∞

Dear Dr. Rosenheim:

	Many thanks for your invitation of December 1.  Unfortunately,
I find I have to concentrate my attention on my areas of specialization
and can't take three days for general educational purposes at this
time.

.sgn