Clarkson, Persis B..
Eyes in the Sky : An Unwieldy Ballon Photographs Designs in the Desert. - Oregon-XXU : The Leach Publishing Group, 1999. - p. 88 : il. - Bimestral - Vol. I, no. 3, (May./Jun. 1999) - Discovering Archaeology ; no. 3 . - Estados Unidos. The Leach Publishing Group. .
Special Report : A Dark New View of the American Soithwest.
Art¡culo en inglés.
Eyes in the Sky : An Unwieldy Ballon Photographs Designs in the Desert. - Oregon-XXU : The Leach Publishing Group, 1999. - p. 88 : il. - Bimestral - Vol. I, no. 3, (May./Jun. 1999) - Discovering Archaeology ; no. 3 . - Estados Unidos. The Leach Publishing Group. .
Special Report : A Dark New View of the American Soithwest.
Art¡culo en inglés.
