@book{6330, author = {Bowditch, Nathaniel, and United States.}, title = {The American practical navigator :}, publisher = {The Agency ;}, year = {2017.}, series = {Pub. ;}, address = {Bethesda, Maryland :}, edition = {2017 edition}, note = {First published under title: The new American practical navigator.}, url = {https://msi.nga.mil/MSISiteContent/StaticFiles/NAV_PUBS/APN/Bowditch_Vol_1_LoRes.pdf} }