Paul Underwood, 1879-1958 Kellogg

• The Survey, Volume 30, Number 1, April 5, 1913
• The Survey, Volume 30, Number 2, Apr 12, 1913
• The Survey, Volume 30, Number 24, Sep 13, 1913
• The Survey, Volume 30, Number 3, Apr 19, 1913
• The Survey, Volume 30, Number 4, Apr 26, 1913
• The Survey, Volume 30, Number 5, May 3, 1913
• The Survey, Volume 30, Number 6, May 10, 1913
• The Survey, volume 30, number 7, May 17, 1913
• The Survey, Volume 30, Number 9, May 31, 1913