The Physics and Metaphysics of Unidentified Flying Objects

The Nonprevalence of Humanoids

George Gaylord Simpson · Science · 1964 · 160 citations

Social Sciences, Anthropology, Psychology +2

General information concerning patents

Inventor Resources · 2011 · 52 citations

Law, Intellectual Property Law, Intellectual Property +11

UFO's Merit Scientific Study

J. A. Hynek · Science · 1966 · 14 citations

Law, Physics, Nature Of Science +1

Unidentified Flying Objects

Carl Sagan · Bulletin of the Atomic Scientists · 1967 · 11 citations