Exploring the Unknown : Selected Documents in the History of the U.S. Civil Space Program Volume 1 : Organizing for Exploration By Books / Hardcover Nature › Space Publisher: National Aeronautics And Space Administration, Price $24.27 Free Shipping Send to a friend Collectible - Very Good First Edition With Dust Jacket First edition copy. Collectible - Very Good. Very Good dust jacket. Vol. 1. (astronautics, decision making, space exploration) NOT AVAILABLE FOR SHIPMENT OUTSIDE OF THE UNITED STATES. $24.27 1 in Stock at Warehouse Quantity Add Free Shipping to continental U.S. OR $1.00 per item discount if shipped to store.