1. Geschichtstafeln der Physik;Auerbach,1910
2. Sources of information on specific subjects;Bradford;Engineering,1934
3. Theory of the Bradford law;Brookes;Journal of Documentation,1977
4. Quantitative analysis in the humanities: The advantage of ranking techniques;Brookes,1982
5. Towards informetrics: Haitun, Laplace, Zipf, Bradford and the Alvey programme;Brookes;Journal of Documentation,1984