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472. OASI (series). 853. Now that you are retiring.

479. Soil Conservation Service, Agriculture Dept. SCS national engineering handbook: sec. 8, Engineering geology, chap. 3, Samples; chap. 4, Logging test holes; chap. 5, Requirements for geologic investigations and sampling; chap. 6, Preliminary site investigation; chap. 7, Detailed site investigation.