Thank you for your letter of July 22, 1977 confirming the Department of Interior's interest in maintaining proprietary data confidential.

I have just learned of Dr. Vincent McKelvey's resignation as Head of the U.S.G.S. Certainly during his tenure of office our Society has been able to establish a very good working relationship with the U.S.G.S. His knowledge and experience in the earth science field has certainly contributed to this relationship.

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