Griffiths, M. The transformation behaviour of the beta phase in Zr2.5 wt percent Nb pressure tubes. - Chalk River, Ont. : AECL, 1994. - 20 p. : il. Bibliografía: p.78 ISBN: 0660158973 ISSN: 00670367 Standard No.: AECL-10835 COG-93179