By Lt. Col. Hector Quintanilla, Jr., U.S. Air Force (Ret.)
(Internet Archive, San Francisco, California)
Source: National Institute for Discovery Science, Las Vegas, Nevada.
The book (copyrighted 1974) was written in 1975, according to NIDS:
The late Hector Quintanilla, Jr. was the last chief officer of Project Blue Book (1963-1970), the U.S. Air Force’s investigation into the UFO phenomenon.
The late Lt. Col. Hector Quintanilla, Jr., U.S. Air Force,
Chief Officer of Project Blue Book (1963-1969)