Results: 1 - 5 of 5
Dec 31, 1977
Open File Report
… m) or greater in thickness and aggregate thicknesses of all seams … greater in thickness but with an aggregate thickness of 5 ft (1.5 m) …
Dec 31, 1956
Information Series
… sieve analysis of the mineral aggregate of the sample. This …
Aug 02, 2006
Data
Aug 02, 2006
Data