00299nam a2200097Ia 4500008004100000082001700041100001900058245007900077250000900156260003600165220204s9999    xx            000 0 und d  a311.1bOST;1  aOstle, Bernard 0aStatistics in research: Basic concepts and techniques for research workers  aEd.2  aNew DelhibOxford and IBHc1974