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	1.	The Comet Halley Handbook : An Observer's Book / Donald K.Yeomans, Zdenek Sekanina by Yeomans, Donald K Sekanina, Zdenek Material type: Text; Format: print Language: English Publication details: New York : International Halley Watch, 1983 Availability: Items available for loan: Byurakan Astrophysical Observatory (1)Call number: B1102Y43f2450. Place hold Add to cart (remove)
	2.	Cometary Astrometry : Proceedings of a Workshop atthe Europena Southern Observatory / ed.by Donald K.Yeomans, Richard M.West, Robert SHarrington, Brian G. Marsden by Yeomans, Donald K [edt] West, Richard [edt.] Material type: Text; Format: print Language: English Publication details: Garching : European Southern Observatory, 1984 Availability: Items available for loan: Byurakan Astrophysical Observatory (1)Call number: B1101C73f2109. Place hold Add to cart (remove)