RT Journal Article
SR Electronic
T1 Asa Gray
JF American Journal of Science
JO Am J Sci
FD American Journal of Science
SP 181
OP 203
DO 10.2475/ajs.s3-35.207.181
VO s3-35
IS 207
A1 Dana, James D.
YR 1888
UL http://www.ajsonline.org/content/s3-35/207/181.abstract
AB