Brief review to be added of Hubertus Strughold's book “The Green and Red Planet” (1954) (available on Amazon USA and on Amazon UK)
Brief review to be added of Sturrock, Peter A's book “The UFO Enigma” (1999) (available on Amazon USA and on Amazon UK)
Much of the text of this book is available online at: “http://www.scientificexploration.org/jse/articles/ufo_reports/sturrock/toc.html
Brief review to be added of Curt Sutherly's book “UFO Mysteries: A Reporter Seeks the Truth” (2001) (available on Amazon USA and on Amazon UK)
Brief review to be added of Walter Sullivan's book “We Are Not Alone” (1964) (available on Amazon USA and on Amazon UK)
Brief review to be added of David W Swift's book “SETI Pioneers : Scientists Talk About Their Search for Extraterrestrial Intelligence” (1990) (available on Amazon USA and on Amazon UK)