TY  - RPRT
TI  - A variable, circular‐arc rule; An aid in constructing stereographic projections
AU  - Robert E. Wallace
AU  - B. Fried
AU  - John Guptil
PY  - 2014
DO  - 10.1029/tr035i004p00645
UR  - https://pubs.usgs.gov/publication/70221471
ID  - 70221471
ER  -