Hinks, Arthur R. (Arthur Robert), 1873-1945 · Cambridge : University press · leaf 40
quite different set of signs,suitable to its smaller scale. Perennial rivers are shown bya solid blue line of varying width; non-perennial are heavilylong-dotted. Unsurveyed rivers are lightly dotted; and navi-gable rivers are shown by a double line. Navigable canals havecross strokes similar to…
Maps · Surveying
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