Note on the beta counting of U 237 and Np 239 /
Stewart, N. G.,author.
Atomic Energy Research Establishment (Harwell, England),issuing body.
Great Britain.Her Majesty's Stationery Office.
"Sept., 1954."
Sold but not published by H.M. Stationery Office.
"Declassified Version of A.E.R.E. HP/M 80."
"With amendments."