Manual for museums

Manual for museums

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National Park Service ... Potentially useful detectors include pressure sensitive floor mats, capacitance units, microwave units, photoelectric ... step, but care is necessary to make sure that sharp eyed visitors cannot discern the mats under a light weight carpet or floor cloth. ... Miniature switches guard 290 Manual for Museums.


Title:Manual for museums
Author: Ralph H. Lewis, United States. National Park Service
Publisher: - 1976
ISBN-13:

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