01168nam 2200397 450 991046804460332120200113101400.00-309-21774-1(CKB)4340000000021009(MiAaPQ)EBC4719228(Au-PeEL)EBL4719228(CaPaEBR)ebr11296951(OCoLC)963789654(EXLCZ)99434000000002100920200113d1964 uy 0engurcnu||||||||txtrdacontentcrdamediacrrdacarrierGround-based astronomy a ten-year program /National Academy of SciencesWashington, District of Columbia :National Academies Press,1964.1 online resource (126 pages)0-309-21773-3 AstronomyResearchUnited StatesElectronic books.AstronomyResearch520.72073National Academy of Sciences,MiAaPQMiAaPQMiAaPQBOOK9910468044603321Ground-based astronomy2145629UNINA