Production systems modelling and the production environment 
By The Open University 
 - Buckinghamshire  The Open University  1972 
 - 109p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Renewable energy sources -- Economic aspects -- Congresses<br/>Agriculture and energy -- Economic aspects -- Congresses<br/>Renewable energy sources -- Congresses<br/>Agriculture and energy -- Congresses
<br/><br/><label>Dewey Class. No.: </label>O91 oh2