Logging and log transport in tropical high forest :  a manual on production and costs. 

 - Rome,  1974. 
 - FAO. Forestry development paper ;  18 .
 - Food and Agriculture Organization of the United Nations. Forestry development paper ;  Food and Agriculture Organization of the United Nations. Forestry development paper ;  18 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Lumbering -- Costs.--Lumbering -- Costs.<br/>Lumbering -- Labor productivity.--Lumbering -- Labor productivity.