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Creation Date 

1. Before 1981  (5)
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Subject 

1. Textiles  (52)
2. Production Of Cellulose  (45)
3. Paper-Making  (45)
4. Regeneration Of Pulping Liquors  (33)
5. Apparatus Therefor  (33)
6. Production Of Cellulose By Removing Non-Cellulose Substancesfrom Cellulose-Containing Materials  (33)
7. Compositions Based Thereon  (18)
8. Their Preparation Or Chemical Working-Up  (18)
9. Organic Macromolecular Compounds  (18)
10. Microbiology  (14)
11. Biochemistry  (14)
12. Propagating, Preserving Or Maintaining Microorganisms  (14)
13. Mutation Or Genetic Engineering  (14)
14. Compositions Thereof  (14)
15. Beer  (14)
16. Enzymology  (14)
17. Microorganisms Or Enzymes  (14)
18. Culture Media  (14)
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