Subject
Operas
11
Czechoslovakia History
3
Engineering geology
3
Communication of technical information International cooperation
2
Czechoslovakia
2
Czechoslovakia Politics and government
2
Czechs
2
Folk songs, Czech
2
Foundations
2
Geophysics
2
Prospecting
2
Research Law and legislation
2
Sacred songs (High voice) with piano
2
Soil conservation
2
Songs (High voice) with orchestra
2
Songs (High voice) with piano
2
World War, 1939-1945
2
Addition polymerization
1
Aeronautics, Commercial Law and legislation
1
Agriculture
1
Androids
1
Applied ecology
1
Armor
1
Art
1
Art Study and teaching (Elementary)
1
Art, Baroque
1
Astronomy
1
Ballistic missile defenses
1
Ballistic missile defenses International cooperation
1
Bulk solids
1
Catalysts
1
Chemical kinetics
1
Chemical tests and reagents
1
Choruses, Secular (Men's voices)
1
Chromatographic analysis
1
Chromatographic detectors
1
Clothing and dress History
1
Complexometric titration
1
Composers
1
Computational linguistics
1
Creative ability in children
1
Criminal justice, Administration of
1
Czech Republic Military relations
1
Czech drama
1
Czech language Data processing
1
Czech literature
1
Czechoslovakia Social conditions
1
Decoration and ornament Art nouveau
1
Defense information, Classified
1
Diaphragm walls
1
more ...