PT  - JOURNAL ARTICLE
AU  - W. Rollins
TI  - Ruling concave gratings
AID  - 10.2475/ajs.s4-15.85.49
DP  - 1903 Jan 01
TA  - American Journal of Science
PG  - 49--53
VI  - s4-15
IP  - 85
4099  - http://www.ajsonline.org/content/s4-15/85/49.short
4100  - http://www.ajsonline.org/content/s4-15/85/49.full
SO  - Am J Sci1903 Jan 01; s4-15