TY  - BOOK
AU  - Fettke,Charles R.
TI  - Glass manufacture and the glass sand industry of Pennsylvania,
T2  - Pennsylvania. Topographic and geologic survey. Report no. XII
AV  - GA61.P4 A5 no. 12
PY  - 1918/// [i.e.1919]
CY  - Harrisburg, Penna.
PB  - J. L. L. Kuhn, printer
KW  - Glass manufacture
KW  - Pennsylvania
N1  - Cover dated 1919; Many plates printed on both sides; Bibliography: p. 264-270
ER  -