Correspondence and papers relating to Apollo 15 lunar drill core samples, collected by Colin Pillinger Published material and correspondence from NASA relating to the lunar drill core samples collected during the Apollo 15 mission. Includes printed 'Stratigraphy of the Apollo 15 Drill Core,' 'Description and Sampling of Apollo 15 core 15002' and 'Dissection and Sampling of Apollo Drill Stem 15003'. Also includes six diagrams of the core sample. Correspondents: Dr Geoffrey Eglinton, University of Bristol John O. Annexstad, NASA Michael B Duke, NASA 6 April 1972 - December 1972