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Title: GAA reflection geophone (TP 840) c. 1950. 9x7 diam cm [Go to resource]
Description: GAA reflection geophone (TP 840) c. 1950. 9x7 diam cm License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Temporal: 1950 Source: Science Museum Identifier: 1985-1421 Go to resource More Like this...
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