1. Nonparametric tests for trend detection in water quality time series;Berryman;Water Resour. Bull.,1988
2. Practical Nonparametric Statistics;Conover,1980
3. Methods for Classifying Changes in Environmental Conditions;Farrel,1980
4. Statistical Methods for Rates and Proportions;Fleiss,1981
5. Statistical Methods for Environmental Pollution Monitoring;Gilbert,1987