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Subject
- Bredig, Max Albert, 1902-197727
- Scientific apparatus and instruments24
- Chemical apparatus22
- Laboratories--Equipment and supplies12
- Manufacturing Chemists' Association (U.S.)12
- Emigration and immigration9
- Water8
- Water--Purification8
- Hochwald, Fritz G., 1897-19687
- Bredig, Georg, 1868-19446
- Homburger, Marianne, 1903-19866
- Water quality6
- Water quality--Testing6
- Water--Purification--Coagulation6
- Water--Purification--Filtration6
- Water--Softening6
- Wolfsberg, Ilse6
- Chemists5
- Schnell, Alfred, 1900-19445
- Schnell, Eva, 1913-19445