PROYECTO ESPOL-KBIN (BELGICA): GEO BIOCHEMICAL STUDY OF SEDIMENTS AND WATER MASS IN THE REGION OF GUAYAQUIL-GUAYAS ESTUARY AND ESTERO SALADO - COMMISSION OF THE EUROPEAN COMMUNITIES (Bélgica International Scientific Cooperation, 1950)
D-17650 S/ 30.000 RECT. BIBL.97.12.30 FOLLETO