APA Citation

Penfield, S L. (1890). Some observations on the beryllium minerals from Mt. Antero, Colorado. American journal of science.

ISBD Citation

"Some observations on the beryllium minerals from Mt. Antero, Colorado / by S.L. Penfield" American Journal of Science .

MLA Citation

Penfield, Samuel Louis. "Some Observations On the Beryllium Minerals From Mt. Antero, Colorado." American Journal of Science 1890.

Remember to check citations for accuracy before including them in your work.