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Energy portal
This is a
container category
. Due to its scope, it should contain
only
subcategories
.
Subcategories
This category has the following 3 subcategories, out of 3 total.
Oil shale mines by country
(1 C)
E
Oil shale companies of Estonia
(8 P)
U
Oil shale companies of the United States
(13 P)
Categories
:
Oil shale mining
Mining by country
Oil shale by country
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