Interrelations of the fossil fuels,
Stevenson, John J. 1841-1924.
Interrelations of the fossil fuels, by John J. Stevenson. - Lancaster, Pa., New era printing company, 1916-1921. - viii, 458 p. 24 cm.
"Reprinted from Proceedings of the American philosophical society, v. 55, 1916; v. 56, 1917; v. 57, 1918; v. 59, 1921."
gs 21000096
Coal.
Geology, Stratigraphic--Carboniferous.
TN800 / .S6
Interrelations of the fossil fuels, by John J. Stevenson. - Lancaster, Pa., New era printing company, 1916-1921. - viii, 458 p. 24 cm.
"Reprinted from Proceedings of the American philosophical society, v. 55, 1916; v. 56, 1917; v. 57, 1918; v. 59, 1921."
gs 21000096
Coal.
Geology, Stratigraphic--Carboniferous.
TN800 / .S6