1. P. Armitage , 1971 Statistical Methods in Medical Research, Oxford, Blackwell.
2. STANDARDIZED CLASS INTERVALS AND RATE COMPUTATION IN STATISTICAL MAPS OF MORTALITY
3. N. K. Chick , 1972 'Screen': data screening program, informal compilation, Computer Contribution No. 36, University of Tasmania, Geography Department.
4. N. K. Chick , 1972 'Sigmort': computer program for significance of mortality, informal compilation, Computer Contribution No. 38, University of Tasmania, Geography Department.