Olson, Donald W.Sinnott, Roger W.2009-05-042012-02-241999-03Olson, D. W., & Sinnott, R. W. (1999). Blue-moon mystery solved? Sky & Telescope, 97(3), pp. 55.https://hdl.handle.net/10877/4025No abstract prepared.Text1 page1 file (.pdf)enblue moonastronomyalmanacscalendarPhysicsArticle