PT  - JOURNAL ARTICLE
AU  - A. L. Ewing
TI  - An attempt to determine the amount and rate of chemical erosion taking place in the limestone (Calciferous to Trenton) valley of Center County, Pennsylvania.
AID  - 10.2475/ajs.s3-29.169.29
DP  - 1885 Jan 01
TA  - American Journal of Science
PG  - 29--31
VI  - s3-29
IP  - 169
4099  - http://www.ajsonline.org/content/s3-29/169/29.short
4100  - http://www.ajsonline.org/content/s3-29/169/29.full
SO  - Am J Sci1885 Jan 01; s3-29