00513nam a2200205Ia 450000500170000000800460001702000180006303700100008104000080009104000080009904000080010704100080011504100080012308400080013124500610013926000370020026000090023765000120024685600490025820260306150631.0008  260114s9999    xx            000 0 eng d  a9781512809343  aEbook  aCRL  beng  cCRL  2eng  aeng  qCRL 4aThe Present and Future of the Telescope of Moderate Size  bUniversity of Pennsylvania Press  c1958  aPhysics  uhttps://www.degruyter.com/isbn/9781512809343