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1. Before 1700  (168)
2. 1700 To 1909  (4,355)
3. 1910 To 1939  (13,134)
4. 1940 To 1952  (29,941)
5. After 1952  (10,338)
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New Records 

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Resource Type 

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5. Books  (1,665)
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8. Archival Material / Manuscripts  (596)
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Subject 

1. Transporting  (7,314)
2. Performing Operations  (7,314)
3. Weapons  (6,801)
4. Lighting  (6,797)
5. Heating  (6,797)
6. Mechanical Engineering  (6,792)
7. Blasting  (6,789)
8. Housing  (4,198)
9. Engineering Elements And Units  (2,767)
10. Thermal Insulation In General  (2,767)
11. General Measures For Producing And Maintaining Effectivefunctioning Of Machines Or Installations  (2,767)
12. Electricity  (2,532)
13. Physics  (2,516)
14. Colleges  (2,368)
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20. Social Sciences  (1,826)
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Databases 

1. esp@cenet  (24,290)
2. ProQuest Central  (11,838)
3. Open Shared Collection  (4,980)
4. HathiTrust Digital Library Full View Worldwide  (2,338)
5. JSTOR Early Journal Content  (2,328)
6. ROAD: Directory of Open Access Scholarly Resources  (2,091)
7. Europeana Collections  (2,080)
8. U.S. Government Documents  (1,971)
9. DigitalNZ  (1,692)
10. ProQuest One Psychology  (1,475)
11. HathiTrust Digital Library Full View U.S. Only  (969)
12. PubMed Central  (843)
13. UMedia  (489)
14. Digital Archive  (260)
15. David Rumsey Historical Map Collection  (248)
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17. HighWire Press (Free Journals)  (191)
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19. Ebook Central - Academic Complete  (158)
20. RiuNet (Universitat Politècnica de València)  (142)
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Language 

1. English  (55,929)
2. Spanish  (2,042)
3. French  (759)
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5. Dutch  (376)
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7. Italian  (67)
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11. Polish  (20)
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15. Lithuanian  (3)
16. Latin  (3)
17. Yiddish  (3)
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19. Norwegian  (2)
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Journal Title 

1. Barron's  (721)
2. Barron's National Business And Financial Weekly  (1,120)
3. Current History  (696)
4. Journal Of The Royal Sanitary Institute  (1,677)
5. Monthly Labor Review  (1,960)
6. Nation's Business  (1,113)
7. Nature  (1,021)
8. Social Forces  (685)
9. The Annals Of The American Academy Of Political And Social Science  (1,252)
10. The Journal Of The Royal Society For The Promotion Of Health  (554)
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