16mm Filmography
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Topographic Mapping

Year Published: 1951

Creator: 18th And F Sts NW

Format: 16mm

Sound: sound

Description: Demonstrates procedures used by the geological survey for leveling required as vertical control for topographic mapping. Pictures equipment and in-the-field operations of a survey leveling team.

No holdings listed.

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Original permalink · Record added: 2023-02-27 05:54:18