1.

図書
図書
1. Radio astronomy and the galactic system
organized by the IAU in co-operation with URSI, held at Noordwijk, the Netherlands, 25 August-1 September, 1966 ; edited by Hugo van Woerden
出版情報: London ; New York : Academic Press, 1967
シリーズ名: Symposium / International Astronomical Union ; no. 31
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2.

図書
図書
2. The Milky Way Galaxy : proceedings of the 106th Symposium of the International Astronomical Union held in Groningen, The Netherlands, 30 May-3 June, 1983 (pbk.)
edited by Hugo van Woerden and Ronald J. Allen and W. Butler Burton
出版情報: Dordrecht : D. Reidel , Hingham, MA, U.S.A. : Sold and distributed in the U.S.A. and Canada by Kluwer Academic Publishers, c1985
シリーズ名: Symposium / International Astronomical Union ; no. 106
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