Blanchard, M. B., & Shade, H. D. (1975). The effect of a planetary surface penetrator on the soil column surrounding the impacting body. National Aeronautics and Space Administration.
Chicago Style (17th ed.) CitationBlanchard, Maxwell B., and Harry D. Shade. The Effect of a Planetary Surface Penetrator on the Soil Column Surrounding the Impacting Body. Washington, D.C.: National Aeronautics and Space Administration, 1975.
MLA (9th ed.) CitationBlanchard, Maxwell B., and Harry D. Shade. The Effect of a Planetary Surface Penetrator on the Soil Column Surrounding the Impacting Body. National Aeronautics and Space Administration, 1975.
Warning: These citations may not always be 100% accurate.