TY  - BOOK
AU  - Chandler, S. C.
AU  - Ritchie, J.
TI  - The science observer code, explanation of the number code: pt.1-3
T2  - Occasional publication; no. 1
PY  - 1888///
CY  - Boston
PB  - Scientific Society
KW  - Astronomy and Astrophysics Thesaurus
KW  - Observer Codes
KW  - Observing Techniques
ER  -