PT  - JOURNAL ARTICLE
AU  - Langley, Richard B.
TI  - Navigator Notes
AID  - 10.1002/navi.401
DP  - 2020 Dec 21
TA  - NAVIGATION: Journal of the Institute of Navigation
PG  - 671--673
VI  - 67
IP  - 4
4099  - https://navi.ion.org/content/67/4/671.short
4100  - https://navi.ion.org/content/67/4/671.full
SO  - NAVIGATION2020 Dec 21; 67