Perhaps you should try some spelling variations:
"specimens philologica slavica" » "specimens philological slavica", "specimina philologica slavica", "specimina philologiae slavica"
"specimen philosophiae slavicae" » "specimen philologiae slavicae", "specimen philosophiae publice", "specimen philologica slavicae"

Try widening your search to All Fields.

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• If you are trying to use Boolean operators, they must be ALL CAPS: (("specimens philologica slavica") OR ("specimen philosophiae slavicae")).
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