Design of a large antimony-beryllium neutron source for use with exponential assemblies /
Crocker, V. S.,author.
Henry, K. J.,author.
Atomic Energy Research Establishment (Harwell, England),issuing body.
Great Britain.Her Majesty's Stationery Office.
"March 7, 1956".
Sold but not published by H.M. Stationery Office.