Results: 1 - 4 of 4
Jul 12, 2020
Data
Jul 15, 2006
Data
… for the 1:50 000 scale terrain classification is a variant of the … the study area. In this terrain classification scheme, each map …
Oct 31, 1947
Information Series
… and shale, mode of occurrence, classification of clays and shales, …
Jan 01, 1944
Report
… the character and therefore the classification by rank of the coal …