Refine My Results

Creation Date 

1. Before 1960  (51,733)
2. 1960 To 1975  (57,191)
3. 1976 To 1991  (191,614)
4. 1992 To 2008  (254,841)
5. After 2008  (778,925)
6. More options 

New Records 

1. New From Last Month  (5,117)
2. New From Last 3 Month  (45,886)
3. More options 

Subject 

1. Obtaining Oil, Gas, Water, Soluble Or Meltable Materials Or Aslurry Of Minerals From Wells  (916,776)
2. Earth Drilling, E.G. Deep Drilling  (916,776)
3. Shafts  (270,003)
4. Large Underground Chambers  (266,212)
5. Galleries  (266,212)
6. Tunnels  (266,212)
7. Lighting  (132,374)
8. Weapons  (132,374)
9. Blasting  (132,374)
10. Heating  (132,374)
11. Mechanical Engineering  (132,374)
12. Safety Devices, Transport, Filling-Up, Rescue, Ventilation, Ordraining In Or Of Mines Or Tunnels  (126,423)
13. Transporting  (126,242)
14. Performing Operations  (126,242)
15. Physics  (107,855)
16. Mining Or Quarrying  (100,481)
17. Chemistry  (80,677)
18. More options 

Language 

1. English  (1,112,691)
2. Chinese  (402,714)
3. French  (195,123)
4. German  (103,672)
5. Russian  (70,341)
6. Norwegian  (23,801)
7. Korean  (13,615)
8. Japanese  (11,700)
9. Polish  (7,227)
10. Swedish  (5,629)
11. Portuguese  (4,429)
12. Danish  (4,287)
13. Finnish  (3,562)
14. Spanish  (3,440)
15. Ukrainian  (3,167)
16. Italian  (2,763)
17. Dutch  (2,052)
18. Romanian  (923)
19. Czech  (737)
20. Indonesian  (264)
21. More options