U.S. DEPARTMENT OF COMMERCE, Juanita M. Kreps, Secretary

Dr. Sidney Harman, Under Secretary

NATIONAL BUREAU OF STANDARDS, Ernest Ambler, Acting Director

Issued June 1977

Architectural
Libraty

KF

5701 N14

1976 - added 15/82

Library of Congress Catalog Card Number: 77-8273

National Bureau of Standards Special Publication 473
Nat. Bur. Stand. (U.S.), Spec. Publ. 473, 504 pages (June 1977)
CODEN: XNBSAV