Diffusion theory of fine structure in thermal neutron reactor assemblies consisting of cylindrical fuel elements set in a square lattice array /
Clark, A. C.,author.
Newmarch, D. A.,author.
Atomic Energy Research Establishment (Harwell, England),issuing body.
Great Britain.Her Majesty's Stationery Office.
"April 18, 1955".
Sold but not published by H.M. Stationery Office.