Wilson, John G. (John Graham) Language of maps / John G. Wilson. - Huddersfield : Schofield and Sims, 1975. - Certificate geography . - Certificate geographies. . ISBN: L.1.15 LCCN: 78305692 Nat. Bib. No.: GB75-24400 Subjects--Topical Terms: Maps. LC Class. No.: GA105.3 / .W54 Dewey Class. No.: 912/.014