TY - GEN AU - Summers,James L. AU - Niehaus, William R. TI - NASA TN [D-137]: A PRELIMINARY INVESTIGATION OF THE PENETRATION OF SLENDER METAL RODS IN THICK METAL TRAGETS PY - 1959/// PB - NASA, Washington, D.C. N1 - NASA Technical Notes D-131-140 Bounded Volumes Accession No. 63638; Contents: TR16036-44 ER -