الموضوعات المستخلصة من بحثك.
الموضوعات المستخلصة من بحثك.
7,471
History
2,364
Geology
2,135
Mathematical models
2,035
Economic conditions
1,646
Politics and government
1,443
History and criticism
1,373
Philosophy
1,359
Geology, Stratigraphic
1,286
Antiquities
1,225
Economics
1,116
Research
1,036
Economic policy
982
Russian language
903
Social conditions
825
Russian literature
781
Science
759
Foreign relations
725
Economic aspects
691
Paleontology
683
Ethnology
682
Ore deposits
649
Agriculture
630
Methodology
622
Data processing
622
Petroleum
574
Mathematics
557
Soils
554
Civilization
551
Ecology
544
Geology, Structural