Explore Books on
coal balls

Textures and conditions of formation of Middle Pennsylvanian coal balls, Central United States

By Thomas W. Perkins

Fossil peat of the Illinois basin

By Tom Lee Phillips

A new fertile Schizaeaceous fern from Middle Pennsylvanian Iowa coal balls

By R. William Baxendale

Zhongguo mei he zhi wu

By

A structurally preserved, Lower Pennsylvanian flora from the New Castle Coal Bed of Alabama

By Richard B. Winston

Geologic investigation of roof and floor strata

By Philip J. DeMaris

Geologic investigation of roof and floor strata

By Robert A. Bauer

Coal balls as an index to the constitution of coal

By James Morton Schopf

Occurrence and significance of marine animal remains in American coal balls

By Sergius H. Mamay

A nevv, cheape and delicate fire of cole-balles

By Plat, Hugh Sir