Source
Manning and Kremp, IFLA (2000)
Ralph W. Manning, Virginie Kremp, eds. (2000), A Reader in Preservation and Conservation, München, K. G. Saur Verlag.
Additional Reference
p. 115
Ralph W. Manning, Virginie Kremp, eds. (2000), A Reader in Preservation and Conservation, München, K. G. Saur Verlag.
p. 115