Ringwald, F. <br/><br/>
Formulation of a method for heating hot-houses by electricity and waste steam from thermal plants for the purpose of growing vegetables and early produce throughout the year. 

 - Geneva :  United Nations Economic Commission for Europe,  1955. 
 - United Nations. [Document] ;  E/ECE/216.E/ECE/EP/165 .
 - Document (United Nations) ;  E/ECE/216.E/ECE/EP/165 .
<br/><br/> At head of title: Rural electrification. 
<br/><br/><label>LCCN: </label>56001491 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Greenhouse management.<br/>Electric heating.<br/>Steam-heating.