UFO Journal Article:

“DIALOGUE WITH VICENTE-JUAN 
BALLESTER OLMOS”

(Journal of UFO History, Vol. IV, No. 4,
September-October, 2007)

(Fundación Anomalía, Santander, Spain)

Vicente-Juan Ballester Olmos talks about his cooperation with the Spanish Air Force, among other things:

http://www.anomalia.org/fotocat/jufoh.pdf

Wikipedia article: “Spanish Air Force”:

http://en.wikipedia.org/wiki/Spanish_Air_Force

Vicente-Juan Ballester Olmos,
Spanish UFO Researcher