Some problems of the conservation of masonry /
Fedorov, V. I.
Irwin, N. T.
London :  Property Services Agency Library, 
1976.
Originally published as 'Quelques problèmes de conservation de la maçonnerie' in: The treatment of stone: proceedings of the joint committee for the conservation of stone, Bologna, October 1-3, 1971, p. 183-196.