Angles of Elevation and Depression.gwb - 1/9 - Wed May 17 2017 08:38:24

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Angles of Elevation and Depression.gwb - 3/9 - Wed May 17 2017 09:45:24

Angles of Elevation and Depression.gwb - 4/9 - Wed May 17 2017 08:53:29

Angles of Elevation and Depression.gwb - 5/9 - Wed May 17 2017 09:00:00

Angles of Elevation and Depression.gwb - 6/9 - Wed May 17 2017 09:04:02

Angles of Elevation and Depression.gwb - 7/9 - Wed May 17 2017 09:09:44

Angles of Elevation and Depression.gwb - 8/9 - Wed May 17 2017 09:10:48

Angles of Elevation and Depression.gwb - 9/9 - Wed May 17 2017 09:12:14