Studies on fuels for tea driers - IV. the relative costs of heating air with firewood, coal and oil

Lamb, J.2014-11-182014-11-181936Tea Quarterly9pp.163-176https://dl.nsf.gov.lk/handle/1/13263AgricultureTea driersFuelHeating systemStudies on fuels for tea driers - IV. the relative costs of heating air with firewood, coal and oilA