Perhaps you should try some spelling variations:
"werner gustav friedrich" » "werner justus friedrich", "werner kuster friedrich", "werner august friedrich", "wagner gustav friedrich", "termeer gustav friedrich", "fechner gustav friedrich"
"werner gustav erich" » "wagner gustav erich", "termeer gustav erich", "fechner gustav erich", "werner gustavi erici", "werner gustav heinrich", "werner gustav brink"

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"werner gustav erich\") OR (\"werner gustav friedrich\"))".
• Removing quotes may allow a broader search: (( werner gustav erich ) OR ( werner gustav friedrich )).
• Adding a wildcard symbol may retrieve word variants: (("werner gustav erich") OR ("werner gustav friedrich"))*.