空气动力学基本原理.PPT.The term “aerodynamics” is generally used for problems arising from flight and other topics involving the flow of air. Ludwig Prandtl,1949 Aerodynamics:The dynamics of gases, especially of atmospheric interactions with moving objects.
Carl B. Boyer The History of the Calculus and its Conceptual Development Dover Publications Inc. 1949 from https://archive.org/details/TheHistoryOfTheCalculusAndItsConceptualDevelopment
