119x
Filetype PDF
File size 2.56 MB
Source: pubs.usgs.gov
File: Glass Raw Materials Pdf 222588 | Report
GLASS-MAKING MATERIALS. During the last season several important glass-manufacturing districts Tiave been visited (by Survey geologists, and careful investigation lias been made of the glass sands and other .raw materials ...
Filetype PDF | Posted on 25 Feb 2023 | 2 years ago