Perhaps you should try some spelling variations:
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"gal robert _. heitmann book" » "goal robert _. heitmann book", "gael robert _. heitmann book", "gail robert _. heitmann book", "gal robert _. heimann book", "gal robert _. heinemann book", "gal robert _. hermann book", "gal robert _. heitmann books", "gal robert _. heitmann ebook"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("gal robert _. heitmann book") or ("a robert b. heilmann ebooks"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("gal robert _. heitmann book") OR ("a robert b. heilmann ebooks")).
• Removing quotes may allow a broader search: (( gal robert _. heitmann book ) or ( a robert b. heilmann ebooks )).
• Adding a wildcard symbol may retrieve word variants: (("gal robert _. heitmann book") or ("a robert b. heilmann ebooks"))*.