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Global review of the actual constraints for harnessing alternative energy sources in the third worldFRITZ, M.Miami international conference on alternative energy sources. 6. sd, pp 172-174Conference Paper
DER EINFLUSS VERAENDERTER UMWELTBEDINGUNGEN AUF DIE ENTWICKLUNG UND ANWENDUNG DER PNEUMATISCHEN FOERDERTECHNIK. I. = INFLUENCE OF THE CHANGED ENVIRONMENTAL CONDITIONS ON THE DEVELOPMENT AND APPLICATION OF PNEUMATIC TRANSPORTATION TECHNIQUES = INFLUENCE DE CONDITIONS AMBIANTES MODIFIEES SUR LE DEVELOPPEMENT ET L'UTILISATION DES TECHNIQUES DE TRANSPORT PNEUMATIQUE. ICUERTEN HJ.1978; AUFBEREIT.-TECH.; DEU; DA. 1978; VOL. 19; NO 8; PP. 363-367; ABS. ENG/FREArticle