Thema Subject Categories 1.4

Previous versions of Thema are still available 1.3 1.2 1.1 1.0.

Browse the Thema subject categories hierarchy, or search for a specific term within the hierarchy.

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Notation Category heading Add Mod ?
R Earth Sciences, Geography, Environment, Planning
Use all R* codes for: academic, technical, specialist and general adult titles. DO NOT USE: code ‘R’ itself, but select specific categories from section R*. Use all R* codes with: other subject categories and qualifiers where appropriate, in particular PLACE 1* Qualifiers
1.4
RB Earth sciences
Use all RB* codes for: academic, specialist and professional level works.
Prefer: WN* codes for the general reader.
See also: RGB* Physical geography and topography and its subcategories, WN* Nature and the natural world: general interest and its subcategories
1.3
RBG Geology, geomorphology and the lithosphere
See also: PHVG Geophysics, RGB Physical geography and topography
1.2
RBGD Geomorphology and geological surface processes
Class here: erosion, deposition, glaciology, fluvial and aeolian processes etc.
See also: RGB Physical geography and topography
1.2

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