January 1st, 1990
Japanese national bibliography
Nihon zenkoku shoshi : shūkanban: Japanese national bibliography : weekly list
Kokuritsu Kokkai Toshokan

Page 60
Helnwein, Gottfried.

Original from the University of Michigan
1990 no.1747-1756
Digitized Sep 22, 2006

http://books.google.com/books?id=Y48XAAAAMAAJ&dq=helnwein