Author

Gottfried Kurt Guennel

2 books found

Placeholder cover for Miospore analysis of the Pottsville coals of Indiana

Miospore analysis of the Pottsville coals of Indiana

Gottfried Kurt Guennel · First published 1958

Placeholder cover for Fossil spores of the Alleghenian coals in Indiana

Fossil spores of the Alleghenian coals in Indiana

Gottfried Kurt Guennel · First published 1952