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␈↓ ↓H␈↓␈↓βS␈↓∧ Artificial Intelligence Laboratory, STANFORD UNIVERSITY, Stanford, California 94305
␈↓ ↓H␈↓∧Telephone 415 497-4430␈↓ 	dDecember 2, 1976




␈↓ ↓H␈↓Professor Karel Culik
␈↓ ↓H␈↓Computer and Information Science
␈↓ ↓H␈↓Graduate Research Center
␈↓ ↓H␈↓University of Massachusetts
␈↓ ↓H␈↓Amherst, Mass. 01002

␈↓ ↓H␈↓Dear Professor Culik:

␈↓ ↓H␈↓I␈α
will␈α
be␈α
glad␈α
to␈α
serve␈α
as␈α
a␈α∞reference.␈α
 I␈α
suggest␈α
that␈α
you␈α
not␈α
make␈α
me␈α
your␈α∞principle␈α
reference,
␈↓ ↓H␈↓because␈α∞I␈α∞have␈α∞not␈α∂read␈α∞any␈α∞of␈α∞your␈α∂more␈α∞important␈α∞papers,␈α∞and␈α∞I␈α∂have␈α∞too␈α∞big␈α∞a␈α∂backlog␈α∞of
␈↓ ↓H␈↓reading in the ≡elds of my direct interest.


␈↓ ↓H␈↓Sincerely,



␈↓ ↓H␈↓John McCarthy
␈↓ ↓H␈↓Director
␈↓ ↓H␈↓Professor of Computer Science