In a few moments you will be automatically forwarded to:

Henry S. Rowen, "Commentary: How He Worked," in Robert Zarate and Henry Sokolski, eds, Nuclear Heuristics: Selected Writing of Albert and Roberta Wohlstetter (Strategic Studies Institute, 2009), pp. 93-122.
The PDF is nearly 3.0 megabytes, so give it a little time to load in your browser.