The company's experience during the [[Great Depression]] is a subject for teaching about [[economics]].<ref>http://www.biography.com/classroom/study-guides/the_kellogg_brothers_corn_flake_kings.jsp</ref> | The company's experience during the [[Great Depression]] is a subject for teaching about [[economics]].<ref>http://www.biography.com/classroom/study-guides/the_kellogg_brothers_corn_flake_kings.jsp</ref> |