Electronic data. [Ann Arbor, Mich. : University of Michigan Digital Library Services, 2002?] PDF/Page image/Ascii text. Mode of access: Internet.
Note
Diagrams are in red and green. They are accompanied by a detachable cardboard with eye-pieces of corresponding colors; the purpose of the device being to give an appearance of relief to the figures.
Misc.
590 No proxy necessary; all public domain documents sj 05112022
