Multiple SVN Repos Inside A Git Repo

Using git-svn, it is possible to have different parts of a git repo
correspond to a specific svn repo? From my understanding after reading
the documentation, you need one git repository per svn.  My example is
that I'm trying to set up a git repo to version control everything
from my classes, but each class has a separate svn repo.  Also, the
number of git repos I can create is limited, and I'd rather not
clutter everything up with many separate git-svn repos.

Example structure:

class/
.......... systems/
.......... algorithms/
.......... physics/

class is one central git repository, and systems, algorithms, and
physics contain data from three svn repositories.  Ideally, you could
commit/update to/from each svn repo individually, or all at once.

Tim