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Title: Balloon filler, Mark IV, Met Ref No.550, in case, with table [Go to resource]
Description: Balloon filler, Mark IV, Met Ref No.550, in case, with table of weights for various balloon sizes or rates of ascent License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: balloon filler Source: Science Museum Identifier: 1995-1930 Go to resource More Like this...
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