looking for two papers, please help

joe

hello, all, i cannot get the access to the two papers, would you so kind to give me some hint?

Roshko, A. Experiments on the flow past a circular cylinder at very high Reynolds number (1961) Journal of Fluid Mechanics, 10, pp. 345-356.

Roshko, A. On the drag and shedding frequency of two-dimensional bluff bodies(1954)

thank you very much in advance!