The Ufo Enigma: The Definitive Explanation of the Ufo Phenomenon (1st Ed)
The Ufo Enigma: The Definitive Explanation of the Ufo Phenomenon by Donald H. Menzel Ex-Library copy with typical library marks and stamps. Dust jacket in good condition. First edition. Shelf and handling wear to cover and binding, with general signs of previous use. Secure packaging for safe delivery.