[ccp4bb] A couple more references for lattice translation disorder

[lbetts0508 .]

for everyone's files.


Trame CB and McKay DB. *Acta Cryst* (2001). D57, 1079-1090


Tsai et al 2009, Acta D 65, 980-988, and references therein including the
Bragg & Howells (1954).


Laurie Betts