In situ determination of the chloride content of portland cement concrete bridge decks / prepared for Federal Highway Administration, Offices of Research & Development Materials Division.

Mode of access: Internet.

Self-administration of abused substances : methods for study /

"Based on papers presented at a technical review conducted by Plog Research, inc., Reseda, California, under NIDA contract no. 271-77 3413 ... on February 14 and 15, 1978, in Reston, Virginia."

Visual range : concepts, instrumental determination, and aviation applications /

Mode of access: Internet.

Determination of the masses of the Moon and Venus and the astronomical unit from radio tracking data of the Mariner II spacecraft

"Prepared under contract no. NAS 7-100, National Aeronautics and Space Administration."

Operating expenses of 125 food stores, including super-markets, self-service stores, service combination stores, cash combination stores, grocery stores, country general stores.

Mode of access: Internet.