1. Report on the Houston Conference, 1966,1966
2. The definition and classification of derelict land;Collins;J. Town Planning Inst.,1969
3. The use of aerial photographs in the study of derelict land;Collins;J. Town Planning Inst.,1969
4. Collins, W.G. and McDonald, P.I., in preparation. Classification and the study of urban land use.
5. Air Photo Interpretation Applied to the Study of Urban Land Use and the Determination of Population Densities;El-Beik,1967