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reau of Standards, Cryogenic Data Center (275.02) A literature survey issued biweekly. Annual sub- Boulder, Colorado 80302.

scription: Domestic, $20.00; foreign, $25.00. Liquefied Natural Gas. A literature survey issued quar

terly. Annual subscription: $20.00. Superconducting Devices and Materials. A literature

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National Bureau of Standards Washington, D.C. 20234

OFFICIAL BUSINESS

Penalty for Private Use, $300

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