PT  - JOURNAL ARTICLE
AU  - Richard B. Langley
TI  - Navigator Notes
AID  - 10.1002/navi.434
DP  - 2021 Jun 20
TA  - NAVIGATION: Journal of the Institute of Navigation
PG  - 239--242
VI  - 68
IP  - 2
4099  - https://navi.ion.org/content/68/2/239.short
4100  - https://navi.ion.org/content/68/2/239.full
SO  - NAVIGATION2021 Jun 20; 68