ENGELN, O. V. (1942). Geomorphology - Systematic and regional - O.D Van Engeln. The Macmillan company.
Chicago Style (17th ed.) CitationENGELN, O.D Van. Geomorphology - Systematic and Regional - O.D Van Engeln. The Macmillan company, 1942.
MLA (8th ed.) CitationENGELN, O.D Van. Geomorphology - Systematic and Regional - O.D Van Engeln. The Macmillan company, 1942.
Warning: These citations may not always be 100% accurate.