http://www.urz.uni-heidelberg.de/subject/hd/fak7/hist/o2/About/o3 (Einblicke ins Internet, 10/1995)
Problems with 100-899 (Subdisciplines)
Note on the classification of subtopics:
There are no subdivisions for the subdisciplines of history provided for
in the Dewey schedules 900-999. It says: "Class historical ... treatment
of a specific discipline or subject with the discipline or subject,
using notation -09". So I am forced to equal, e.g., economic history
with history of economics. Is that tolerable?
Any advice about this classification is welcome and should be directed to
x28@vm.urz.uni-heidelberg.de