Description: This booklet gives an overview of air masses as they relate to aviation. According to the scope notes on the title page, it includes an "Explanation of the classification of air masses; weather associated with particular air masses; [and the] trajectory and source region of air masses that invade the United States." The text also has self-evaluation questions printed throughout, with the answers printed on the last page.
Date: February 1971
Creator: Snyder, Henry W.
Item Type: Pamphlet
Partner: Boyce Ditto Public Library