Gill, Gerard J. Seasonality and agriculture in the developing world : a problem of the poor and powerless / Gerard J. Gill. - Cambridge : Cambridge University Press, 1991. - xvii, 343 p. ISBN: 0521382572 LCCN: 91026260 Subjects--Topical Terms: Agriculture--Economic aspects--Developing countries.Crops and climate--Economic aspects--Developing countries.Rural poor--Developing countries.