Brinton, Willard Cope, 1880- · New York, The Engineering magazine company · leaf 227
210 GRAPHIC METHODS … upon favorably if the plan must Engineering Record be presented to a board of direc- Drainage Area of the Canadian Fig. 169. River, New Mexico tors on tracing-cloth drawings Areas of different kinds may be distinguished on maps with the map itself only very by various classes of shading when color…
Graphic methods · Statistics
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