Bernhard Gutmann : an American impressionist, 1869-1936 / by Percy North ; pref. by William H. Gerdts ; Bernhard Gutmann Collection curator Christian title. - 1st ed.. - New York : Abbeville Press, c.1995. - 199 p. : ill. (some col.) ; 29 cm.см.. - ბიბლიოგრ.: გვ. 191-193. - ISBN 1-55859-611-9[MFN: 41298]