1. Arthur D. Little, Inc., Special Report 102, Air Force Ballistic Missile Division, Contract No. AF 04(645)-34 (March 15, 1959).
2. Design of Piping for Flexibility with Flex-Anal Charts, Blaw-Knox Company, Pittsburgh.
3. Zal!ea Expansion Joints—Catalog 56, Zallea Brothers, Wilmington.
4. Badger S-R Expansion Joints—Catalog No. EJC-581, Badger Manufacturing Company, Cambridge, Mass.
5. Expansion Joints and Hydropads—Catalog 52, Cook Electric Company, Chicago.