Exploring Near Space: Scientific Ballooning and the Columbia Scientific Balloon Facility (proof) By Dr. Henry C. Dethloff Books / Paperback Nature › Space Publisher: Dr. Henry C. Dethloff, January 2012 Price $29.96 Free Shipping Send to a friend Collectible - Good Signed Signed Copy Collectible - Good. Proof. Signed/Inscribed by author on title page. Inscription crossed out. (space, nasa, hsees) $29.96 1 in Stock at Warehouse Quantity Add Free Shipping to continental U.S. OR $1.00 per item discount if shipped to store.