المؤلفون: Shaw, Edward B., O'Leary, Jay, Medelman, J. P., Hoffman, R. Frank, Tompkins, Charles A., Khan, Abdul Hakim, Jacques, Richard H., Lee, Henry F.

المصدر: Hospital Practice ; volume 6, issue 8, page 13-18 ; ISSN 2154-8331 2377-1003

الاتاحة: http://dx.doi.org/10.1080/21548331.1971.11706073
http://www.tandfonline.com/doi/pdf/10.1080/21548331.1971.11706073