TY  - JOUR
T1  - On the Four Visible Ingredients in Banded Bituminous Coal: Studies in the Composition of Coal, No. 1
JF  - Proceedings of the Royal Society of London. Series B, Containing Papers of a Biological Character (1905-1934)
VL  - 90
IS  - 633
SP  - 470
EP  - 487
PY  - 1919/05/15/
UR  - http://dx.doi.org/10.1098/rspb.1919.0006
M3  - doi:10.1098/rspb.1919.0006
AU  - Stopes, M.
ER  -