Report on the groete creek and mariwa goldfields of the lower essequibo and lower cuyuni rivers :
Davies , D.A Bryn
Report on the groete creek and mariwa goldfields of the lower essequibo and lower cuyuni rivers : geological survey of british guiana by D.A Bryn Davies - Georgetown, Demerara : the argosy to the government of british guiana 1938
Bulletin No. 6, report on the occurrence of managanese ore at saxaxalli. lower essequibo
Geology History of the fields and production hill deposits
553 / DAV/R
Report on the groete creek and mariwa goldfields of the lower essequibo and lower cuyuni rivers : geological survey of british guiana by D.A Bryn Davies - Georgetown, Demerara : the argosy to the government of british guiana 1938
Bulletin No. 6, report on the occurrence of managanese ore at saxaxalli. lower essequibo
Geology History of the fields and production hill deposits
553 / DAV/R
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