Matsch, C. L. North America and the great ice age. Mcgraw-Hill.
Chicago Style (17th ed.) CitationMatsch, Charles L. North America and the Great Ice Age. Mcgraw-Hill.
MLA (8th ed.) CitationMatsch, Charles L. North America and the Great Ice Age. Mcgraw-Hill.
Warning: These citations may not always be 100% accurate.