Compass Bearings.
Compass Bearings [link]Paper  bibtex   
@misc{noauthor_compass_nodate,
	title = {Compass {Bearings}},
	url = {http://maps.nrcan.gc.ca/topo101/compass_e.php},
	urldate = {2010-12-02},
	keywords = {compass, map reading},
}

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