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Creation Date 

1. Before 1957  (21)
2. 1957 To 1967  (18)
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Subject 

1. Chemistry  (27)
2. Metallurgy  (27)
3. Physical Or Chemical Processes Or Apparatus In General  (21)
4. Separation Of Solid Materials Using Liquids Or Using Pneumatictables Or Jigs  (20)
5. Magnetic Or Electrostatic Separation Of Solid Materials From Solidmaterials Or Fluids  (20)
6. Separation By High-Voltage Electric Fields  (20)
7. Their Relevant Apparatus  (13)
8. Chemical Or Physical Processes, E.G. Catalysis Or Colloidchemistry  (13)
9. Separation  (10)
10. Acyclic Or Carbocyclic Compounds  (9)
11. Organic Chemistry  (9)
12. Differential Sedimentation  (8)
13. Flotation  (8)
14. Separating Solid Materials Using Liquids Or Using Pneumatictables Or Jigs  (8)
15. Compositions Based Thereon  (7)
16. Their Preparation Or Chemical Working-Up  (7)
17. Organic Macromolecular Compounds  (7)
18. Working Of Plastics  (6)
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Language 

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2. English  (16)
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