RT Journal Article
SR Electronic
T1 The causes of variation
JF American Journal of Science
JO Am J Sci
FD American Journal of Science
SP 49
OP 52
DO 10.2475/ajs.s3-28.163.49
VO s3-28
IS 163
A1 Hitchcock, R.
YR 1884
UL http://www.ajsonline.org/content/s3-28/163/49.abstract
AB