Needham, A., Morris, S., & Bryant, P. (1975). Methodology: The design and analysis of experiments to evaluate the performance of various forms and orders of catalogue. Bath University Library.

Needham, Angela, Susan Morris, and Philip Bryant. Methodology: The Design and Analysis of Experiments to Evaluate the Performance of Various Forms and Orders of Catalogue. Bath: Bath University Library, 1975.

Needham, Angela, et al. Methodology: The Design and Analysis of Experiments to Evaluate the Performance of Various Forms and Orders of Catalogue. Bath University Library, 1975.