'Higher mathematics', Harpers
Tags: 1920s; 1922; 1922-12-1; Day laborers; Humor; Mathematics; Maths; Other; United States
'Mathematics up to date', Harpers
Tags: 1920; 1920-3-1; 1920s; Addition; Children�s questions and answers; Humor; Inflation (Finance); Mathematics; Maths; Other; Study and teaching; United States
'Willy�s mathematics', Harpers
Tags: 1920; 1920-3-1; 1920s; Clerks (Retail trade); Grocery shopping; Humor; Mathematics; Maths; Role playing in children; Study and teaching; Teaching; United States
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