Orders should be addressed to the Office of Standard Reference Materials, National Institute of Standards & Technology, Washington, DC 20234. Orders should give the amount (number of units), catalog number and name of the standard requested. For example: 1 each, SRM 11h, Basic Open-Hearth Steel, 0.2 percent C. These materials are distributed only in the units listed.

[41 FR 8472, Feb. 27, 1976, as amended at 55 FR 38315, Sept. 18, 1990]