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raw material base
diet
2
food habits
2
peoples of the north
2
wild plants
2
Engineering (General). Civil engineering (General)
1
G1-922
1
Geography (General)
1
TA1-2040
1
demo
1
envir
1
export
1
mineral fertilizers
1
ores types and reserves
1
phosphate production
1
phosphogenesis
1
phosphorite and apatite deposits
1
phosphorus deficiency
1
productivity
1
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