2026-06-27http://hdl.handle.net/123456789/126062Reviews procedures for obtaining reliable information on animal populations, other ecological features and land use generally from low-flying aircraft by direct observation or conventional photography, with reference to types of sampling unit, and the relative merits of unstratified systematic and stratified random sampling.Open Accessaerial surveyingsamplinganimal populationecologyland useaircraftphotographysampling unitsrandom samplingstratified samplingBook