Solution of the pile equation for a bare cylindrical system of hexagonal cross-section /
Hines, K. C.,author.
Holbrough, D. W.,author.
Atomic Energy Research Establishment (Harwell, England),issuing body.
Great Britain.Her Majesty's Stationery Office.
"April, 1957."
Sold but not published by H.M. Stationery Office.