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18-173
DRILL
4
DSDP
4
Deep Sea Drilling Project
4
Drilling/drill rig
4
12-116
3
12-119
3
14-142
3
15-149
3
16-158
3
18-178
3
19-183
3
21-210
3
22-213
3
22-218
3
Glomar Challenger
3
10-90
2
10-97
2
11-104
2
12-118
2
15-153
2
16-159
2
17-166
2
17-171
2
19-192
2
20-199
2
21-205
2
21-206
2
21-208
2
21-209
2
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