The influence of two-dimensional stream shear on airfoil maximum lift,

"Project 9R-38-01-000, Task 902. Contract DA 44-177-TC-439. U. S. Army Transportation Research Command, Transportation Corps, Fort Eustis, Virginia."

The two-dimensional effects of slipstream shear on airfoil characteristics

"Project no. 9-38-01-000, Task 902. Contract no. DA 44-177-TC-439."

The effects of axisymmetric shear on airfoil characteristics,

"Task 9R 38-11-009-03. Contract DA44-177-TC-439."