1. An Introduction to Categorical Data Analysis;Agresti,1996
2. Physicochemical and Biological Characteristics of Two Ethiopian Wetlands;Ambelu,2013
3. Time budget and habitat use of the Common Crane wintering in dehesas of SouthwestSpain;Aviles;Can. J. Zool.,2003
4. Feeding and roosting sites of common cranes, black crowned cranes and wattled cranes during the dry season at lake Tana, Ethiopia;Aynalem;Afr. Cranes Wetlands Commun. Newslett.,2009
5. Observation on the biology and ecology of cranes: wattled cranes (Grus carunculatus), Black-crowned cranes (Balearica pavonina), and Eurasian cranes (Grus grus) at Lake Tana, Ethiopia;Aynalem;J. Afr. Crane Res. Conserv.,2011