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Browsing results matching Underwater exploration -- History -- 20th century.

	Subject	Items
1.	Underwater crime investigation -- United States.	1
2.	Underwater cutting	0
3.	See Underwater welding and cutting	1
4.	Underwater demolition teams -- Juvenile fiction.	1
5.	Underwater demolition teams -- United States.	1
6.	Underwater diving	0
7.	See Deep diving	21
8.	Underwater engineering	0
9.	See Ocean engineering	7
10.	Underwater exercises	0
11.	See Aquatic exercises	16
12.	Underwater exploration	23
13.	See Also Deep diving	21
14.	See Also Underwater archaeology	28
15.	Underwater exploration -- Alaska -- Kiska Island Region.	1
16.	Underwater exploration -- Arctic Ocean.	2