Mineral resource information in support of national, regional and local planning : West Yorkshire (comprising Metropolitan Boroughs of Bradford, Calderdale, Kirklees and Wakefield and City of Leeds): British Geological Survey report CR/04/172N / F.M. McEvoy, D. Minchin, D.J. Harrison, D.G. Cameron, E.J. Steadman, S.F. Hobbs, N.A. Spencer, D.J. Evans, G.K. Lott, E.M. Bartlett, and D.E. HighleyBooks/Monographs
