Tympanotonus fuscatus was collected from 23 markets through Rivers State (Nigeria), a few in neighbouring states, and from an unexploited population at Buguma. The size distribution of shells was determined,and information on prices and trade routes was also obtained. The mean shell length of...

Long-term morphological change in UK building stocks suggests that industrialisation and division of labour initially stimulated diversity among process-specific buildings. Latterly, process-specific buildings may have lost some prominence to non-process-specific ones. Possible causes for this...

Some relationships between work-load fluctuations and quality of building design are explored. Designers' experience of temporary overstraining and slackness indicates divergent views, associated with level of responsibility. There follow implications for building quality in boom (such as that...