TY  - BOOK
AU  - Cirkel,Fritz
ED  - Canada.
TI  - Graphite,: its properties, occurrence, refining and uses,
AV  - TN845 .C415
PY  - 1907///
CY  - Ottawa
KW  - Graphite
N1  - Part of illustrative matter folded; Bibliography: p. 287-289
ER  -