TY  - RPRT
TI  - Observatories, program in USA
AU  - Jeffrey J. Love
AU  - J.B. Townshend
PY  - 2007
DO  - 10.1007/978-1-4020-4423-6_231
UR  - https://pubs.usgs.gov/publication/70200684
ID  - 70200684
ER  -