MTDC Staff, . 1979. Engineering Field Notes: Volume 11 Number 2 February 1979. 7971 3802. Washington DC: U.S. Department of Agriculture, Forest Service, Engineering. 16 p.

Topics in this issue include:

• Unified Rock Classification System—Clarification and Amendments
• Forest Transportation Analysts—Job Performance and Training Requirements
• The Use of Corrugated Metal Culverts Liners to Minimize Stream Bedload Effects
• Washington Office News

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