Perhaps you should try some spelling variations:
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"donauschwabischen schrifttum heft 1" » "donauschwabisches schrifttum heft 1" (Expand Search), "donauschwabisches christentum heft 1" (Expand Search), "donauschwabischen geschichte heft 1" (Expand Search), "donauschwabischen schrifttum heft 3" (Expand Search)

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