Some interesting cases of steady helicoidal Beltrami flow
By: Paul F. Nemenyi and R. C. Prim.
Contributors: Prim, R. C.; U.S. Naval Gun Factory; U.S. Naval Ordnance Laboratory, White Oak, Md
Series: U.S. Naval Ordnance Laboratory. Memorandum -- 9426
Publisher: U.S. Naval Ordnance Laboratory
Published: 1947
Place of publication: Washington, D.C