For further information...
...on our topic you may visit these links:
The Heidelberger Studentenwerk:
http://www.studentenwerk.uni-heidelberg.de/zv_portal/zv
The German Federal Foreign Office:
http://www.auswaertiges-amt.de/sid_74459D98F8B6E82B34880F17C3CC8CA2/EN/Startseite_node.html
The German Federal Ministry of Education and Research:
http://www.bmbf.de/en/index.php
U.S. Department of Education:
http://www.ed.gov/
U.S. Citizenship and Immigration Services:
http://www.uscis.gov/
The Heidelberger Studentenwerk:
http://www.studentenwerk.uni-heidelberg.de/zv_portal/zv
The German Federal Foreign Office:
http://www.auswaertiges-amt.de/sid_74459D98F8B6E82B34880F17C3CC8CA2/EN/Startseite_node.html
The German Federal Ministry of Education and Research:
http://www.bmbf.de/en/index.php
U.S. Department of Education:
http://www.ed.gov/
U.S. Citizenship and Immigration Services:
http://www.uscis.gov/