RT Journal Article
SR Electronic
T1 Geological horizons as determined by vertebrate fossils
JF American Journal of Science
JO Am J Sci
FD American Journal of Science
SP 336
OP 338
DO 10.2475/ajs.s3-42.250.336
VO s3-42
IS 250
A1 Othniel Charles Marsh
YR 1891
UL http://www.ajsonline.org/content/s3-42/250/336.abstract
AB