Brinton, Willard Cope, 1880- · New York, The Engineering magazine company · leaf 267
250 GRAPHIC METHODS … "Modern PMlarUliropy" , W. H. Allen, Dodd, Mead & Cu. Fig. 200. Sources of the First 3,000 Letters of Appeal Sent to Mrs. E. H. Harriman. These 3,000 Letters Asked for $70,000,000 Eight different kinds of pins were used on this map to represent different kinds of appeals. Long pins like those seen…
Graphic methods · Statistics
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