Does anyone have technical information on how he manipulated his images, especially his pinhole images of Manhattan buildings, in the darkroom?

Some examples: http://bldgblog.blogspot.com/2006_03...g_archive.html (about 2/3 of the way down the page)

A book on his work: http://www.amazon.com/Aaron-Rose-Pho...e=UTF8&s=books


Thanks.