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1. Before 1900  (29)
2. 1900 To 1929  (5,175)
3. 1930 To 1950  (16,331)
4. 1951 To 1954  (4,433)
5. After 1954  (3,598)
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New Records 

1. New From Last Month  (2)
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Resource Type 

1. Patents  (25,687)
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5. Books  (36)
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7. Images  (28)
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Subject 

1. Chemistry  (16,560)
2. Metallurgy  (16,096)
3. Coating Metallic Material  (16,032)
4. Diffusion Treatment Of Metallic Material  (16,032)
5. Inhibiting Corrosion Of Metallic Material Or Incrustation Ingeneral  (16,032)
6. Coating Material With Metallic Material  (16,032)
7. Chemical Surface Treatment  (16,032)
8. Electricity  (10,539)
9. Basic Electric Elements  (10,386)
10. Spark Gaps  (9,659)
11. Overvoltage Arresters Using Spark Gaps  (9,658)
12. Sparking Plugs  (9,658)
13. Generating Ions To Be Introduced Into Non-Enclosed Gases  (9,658)
14. Corona Devices  (9,658)
15. Cleaning Or Degreasing Of Metallic Material By Chemicalmethods Other Than Electrolysis  (2,624)
16. Non-Mechanical Removal Of Metallic Material From Surface  (2,515)
17. Ions  (2,494)
18. Science & Technology  (2,133)
19. Old Medline  (1,657)
20. Performing Operations  (1,529)
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Databases 

1. esp@cenet  (25,687)
2. MEDLINE  (1,756)
3. HighWire Press (Free Journals)  (1,134)
4. PubMed Central  (818)
5. Geneva Foundation Free Medical Journals at publisher websites  (816)
6. ProQuest Central  (506)
7. JSTOR Early Journal Content Free  (453)
8. ProQuest One Psychology  (196)
9. DOAJ Directory of Open Access Journals  (182)
10. DTIC STINET  (149)
11. DTIC Technical Reports  (149)
12. Europeana Collections  (114)
13. Technical Report Archive and Image Library (TRAIL) @ UNT Digital Library  (86)
14. Wiley Online Library Open Access  (78)
15. Digital Library of the Commons  (67)
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17. Hyper Article en Ligne (HAL) (Open Access)  (53)
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19. Sabinet African Journals Open Access Collection  (27)
20. ROAD: Directory of Open Access Scholarly Resources  (23)
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Language 

1. English  (18,422)
2. French  (5,963)
3. German  (4,502)
4. Russian  (573)
5. Japanese  (335)
6. Finnish  (39)
7. Spanish  (20)
8. Romanian  (15)
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11. Italian  (7)
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13. Latin  (6)
14. Polish  (3)
15. Afrikaans  (3)
16. Hungarian  (2)
17. Catalan  (2)
18. Arabic  (1)
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Journal Title 

1. Archives Of Biochemistry And Biophysics  (102)
2. Biochemical Journal  (124)
3. Journal Of The American Chemical Society  (138)
4. Nature  (203)
5. Proceedings Of The National Academy Of Sciences - Pnas  (174)
6. Proceedings Of The Royal Society Of London Series A-Mathematical And Physical Sciences  (110)
7. Proceedings Of The Royal Society Of London. Series A, Containing Papers Of A Mathematical And Physical Character  (212)
8. Proceedings Of The Royal Society Of London. Series A, Mathematical And Physical Sciences  (266)
9. Proceedings Of The Royal Society. A, Mathematical, Physical, And Engineering Sciences  (161)
10. The Journal Of Biological Chemistry  (112)
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