COMMENT ⊗ VALID 00002 PAGES C REC PAGE DESCRIPTION C00001 00001 C00002 00002 .require "let.pub" source C00003 ENDMK C⊗; .require "let.pub" source ∂AIL Dr. Peter Lucas↓Thomas J. Watson Research Center ↓P.O. Box 218 ↓Yorktown Heights, New York 10598∞ Dear Dr. Lucas: Many thanks for your letter of May 15. It was the Ollengren book I had in mind. .reg