Refine My Results

Creation Date 

1. Before 1978  (22,734)
2. 1978 To 1980  (35,321)
3. 1981 To 1983  (41,116)
4. 1984 To 1987  (64,158)
5. After 1987  (70,780)
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New Records 

1. New From Last Month  (972)
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Subject 

1. Displaying  (126,250)
2. Labels Or Name-Plates  (126,250)
3. Signs  (126,250)
4. Electricity  (43,632)
5. Optics  (43,220)
6. Educational Or Demonstration Appliances  (42,233)
7. Planetaria  (42,233)
8. Appliances For Teaching, Or Communicating With, The Blind,deaf Or Mute  (42,233)
9. Diagrams  (42,233)
10. Globes  (42,233)
11. Frequency-Changing  (38,140)
12. Optical Analogue/digital Converters  (38,140)
13. Non-Linear Optics  (38,140)
14. Optical Logic Elements  (38,140)
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Language 

1. English  (208,172)
2. French  (15,958)
3. German  (14,861)
4. Spanish  (5,215)
5. Italian  (3,170)
6. Russian  (2,800)
7. Korean  (2,397)
8. Portuguese  (2,280)
9. Dutch  (1,629)
10. Swedish  (1,524)
11. Danish  (915)
12. Finnish  (910)
13. Norwegian  (684)
14. Romanian  (173)
15. Japanese  (131)
16. Polish  (72)
17. Hungarian  (27)
18. Bulgarian  (24)
19. Turkish  (13)
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