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- Quelques résultats concernant la répartition de la matière interstellaire et la structure du système galactique
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- On the system of astronomical constants (edited and completed by DIRK BROUWER, with the aid of notes by - (Errata: 10 146)
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- Estimates of 7 southern variable stars made by C. A. M. Snelders on Franklin-Adams plates, discussed by -