LANL
LA-10860 and Reference Set: Critical Dimensions of Systems Containing ²³⁵U, ²³⁹Pu, and ²³³U.

LA-12808 and Reference Set: Nuclear Criticality Safety Guide.

Other
ARH-600, Criticality Handbook.

Volume 1: Criticality Safety—Nuclear Materials Section
Volume 2: Advance Process Development Section
Volume 3: Advance Process Development Section