Number | Date | Country | Kind |
---|---|---|---|
820456 | Feb 1982 | FIX |
Number | Name | Date | Kind |
---|---|---|---|
1891337 | Seaman | Dec 1932 | |
3262839 | Luthgens | Jul 1966 |
Number | Date | Country |
---|---|---|
1099837 | Feb 1961 | DEX |
390219 | Nov 1973 | SUX |
392195 | Nov 1973 | SUX |
Entry |
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Pulp and Paper Manufacture, Second Edition, vol. 1, The Pulping of Wood, MacDonald, Editor, McGraw-Hill Book Company, N.Y., N.Y., 1969, pp. 428-435, 439-443, 471-478, 763 and 764. |