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Creation Date 

1. Before 1900  (2)
2. 1900 To 1919  (22)
3. 1920 To 1939  (76)
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5. After 1951  (121)
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New Records 

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Resource Type 

1. Patents  (319)
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Subject 

1. Lighting  (146)
2. Weapons  (146)
3. Blasting  (146)
4. Heating  (146)
5. Mechanical Engineering  (146)
6. Transporting  (101)
7. Performing Operations  (101)
8. Technical Subjects Covered By Former Uspc Cross-Reference Art Collections [xracs] And Digests  (100)
9. General Tagging Of Cross-Sectional Technologies Spanning Over Several Sections Of The Ipc  (100)
10. General Tagging Of New Technological Developments  (100)
11. Technologies Or Applications For Mitigation Or Adaptation Againstclimate Change  (99)
12. Electricity  (44)
13. Manufacture Or Storage Of Ice  (43)
14. Heat-Pump Systems  (43)
15. Liquefaction Solidification Of Gases  (43)
16. Refrigeration Or Cooling  (43)
17. Refrigeration Machines, Plants Or Systems  (43)
18. Combined Heating And Refrigeration Systems  (43)
19. Heat Pump Systems  (43)
20. Mehrfamilienhaus  (41)
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Databases 

1. esp@cenet  (319)
2. Europeana Collections  (67)
3. Walter De Gruyter: Open Access Journals  (18)
4. Münchener DigitalisierungsZentrum (MDZ)  (10)
5. e-periodica  (9)
6. HathiTrust Digital Library Full View U.S. Only  (6)
7. ProQuest Central  (3)
8. ROAD: Directory of Open Access Scholarly Resources  (2)
9. US Government Documents  (2)
10. JSTOR Early Journal Content  (1)
11. Freely Accessible Arts & Humanities Journals  (1)
12. DOAB: Directory of Open Access Books  (1)
13. De Gruyter Open Access Books  (1)
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Language 

1. English  (16)
2. Dutch  (4)
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4. Latin  (1)
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Journal Title 

1. Bauen + Wohnen = Construction + Habitation = Building + Home : Internationale Zeitschrift  (4)
2. Economica  (1)
3. Economica-New Series  (1)
4. Foreign Affairs  (1)
5. Helvetia : Magazine Of The Swiss Society Of New Zealand  (1)
6. Jahrbücher Für Nationalökonomie Und Statistik  (16)
7. Jahrbücher Für Nationalökonomie Und Statistik / Journal Of Economics And Statistics  (2)
8. Monthly Labor Review  (2)
9. Plan  (1)
10. Rural Sociology  (1)
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