"These communities, sometimes quite large, numbering in hundreds, sometimes thousands of citizens depending on the water available, are often hundreds of pasangs apart. They depend on caravans, usually from Tor, sometimes from Kasra, sometimes even from far Turia, to supply many of their needs. In turn, of course, caravans export the products of the oases."
"Tribesmen of Gor" Page36/7
"The water in an oasis is, of course, at its lowest point. Residences, at an oasis, are built on the higher ground, where nothing will grow. It is the valley, naturally, which, irrigated, usually by hand, though sometimes with clumsy wooden machinery, supports the agriculture. Land, at an oasis, which will grow food, is not wasted on domiciles." "tribesmen of Gor" Page 40