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3
Non-Commercial Use
3
Category
Experimental Chemistry
3
Maker
Johnsons of Hendon Limited
1
Johnsons of Hendon Ltd
1
Merck & Co., Inc.
1
Merck and Company Incorporated
1
Micro Essential Laboratory Inc
1
Object type
ph paper
3
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A perspex box containing six books of universal indicator papers
1970-1977
A perspex box conaining plastic strips with indicator paper at the end
circa 1980
Two dispenser rolls of high precision pH paper
circa 1970
