Abnormalities in passive movement: diagrammatic representation.
Jennifer Hickling, Maitland Gd · PubMed · 1970
Geography would be incomprehensible without maps. They've reduced a tremendous muddle of facts into something you can read at a glance. Now I suspect [passive movement] is fundamentally no more difficult than geography. Except that it's about things in motion. If only somebody would invent a dynamic map. C. P. Snow 2 2Strangers and Brothers, 1965, Penguin Books Limited, England, p. 67.