New Yorker Feb 1947 cover by Edna Eicke
Vintage magazine covers
Vanity Fair April 1934, Katherine Hepburn
Advertising Age March 1931
Interiors May 1946
Tricolor July-August 1946
Fortune magazine covers
Here's a nice flickr set by Unkee E. on flickr. Lots more at the link!
January 1958 Alan Fletcher
June 1957 Cover by Lio Lionni & Howard Low
November 1948 Hans Moller
May 1948 Cover by George Giusti
June, 1952 Cover by Walter Allner
This one from April 1953 by S. Neil Fujita is from the flickr stream of Leif Peng
Covers from the Herb Lubalin Center collection
Cover of the βCorneille-landmeterβ exhibition catalog from the Stedelijk Museum, designed by Wim Crouwel, Total Design, 1966
Cover of the βGedrukt in Japanβ exhibition catalog from the Stedelijk Museum, designed by Wim Crouwel, Total Design, 1967
Cover of Gebrauchsgraphik by Heinz Hadem, 1950
Cover of Graphis magazine by Joseph Binder, 1948
Cover of Publimondial by Donald Brun. 1948
Cover of βDesign Quarterlyβ by Rob Roy Kelly, Walker Art Center. 1963