sentences:  Estimated all-weather road density is reported to be between 10.1 and 20 kilometers per 1000 square kilometers.Coal-bearing clay seams near Chilga, north-west of Lake Tana and 35 km from Gondar, were explored in 1937, 1952, and 1960.A sample enumeration performed by the CSA in 2001 interviewed 33,624 farmers in this woreda, who held an average of 0.61 hectares of land.