Change in reactivity of a pile during operation /
Codd, J.,author.
Hill, J. F.,author.
Atomic Energy Research Establishment (Harwell, England),issuing body.
Great Britain.Her Majesty's Stationery Office.
"April, 1951."
Sold but not published by H.M. Stationery Office.
Declassified version of A.E.R.E. R/R 671.