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OCR-text (abbyy)
Borgman, Jan
Electronic scanning for variable stars.
4:0 's-Gravenhage 1956.
Diss. Groningen.
OCR-text (abbyy-crop)
Borgman, Jan
Electronic scanning for variable stars.
4:0 ’ s-Gravenhage 1956.
Diss. Groningen.
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