PT  - JOURNAL ARTICLE
AU  - James Dwight Dana
TI  - On a system of rock notation for geological diagrams
AID  - 10.2475/ajs.s3-29.169.7
DP  - 1885 Jan 01
TA  - American Journal of Science
PG  - 7--10
VI  - s3-29
IP  - 169
4099  - http://www.ajsonline.org/content/s3-29/169/7.short
4100  - http://www.ajsonline.org/content/s3-29/169/7.full
SO  - Am J Sci1885 Jan 01; s3-29