In 1993 the British Museum (Natural History) changed its name to the Natural History Museum. Works by these bodies are found under the name used at the time of publication.
Generally, use this heading for publications of the "Natural History Museum" from 1994 onwards.
Info. from British Library, 11/10/94 (British Museum (Natural History) officially changed its name in 1993 to Natural History Museum but the latter was name used informally well before this date)