Neutron attenuation in concrete /
Spinney, K.T.,author.
Atomic Energy Research Establishment (Harwell, England),issuing body.
Great Britain.Her Majesty's Stationery Office.
"Feb., 1955."
"Declassified version of A.E.R.E. T/R 1617 SWP/P 21."
Sold but not published by H.M. Stationery Office.