The passage provides the title and author information for the book "Lectures on Classical Differential Geometry" by Dirk J. Struik, a professor of mathematics at the Massachusetts Institute of Technology. The book was published in 1950 by Addison-Wesley Press, Inc., located in Cambridge, Massachusetts.The passage provides the title and author information for the book "Lectures on Classical Differential Geometry" by Dirk J. Struik, a professor of mathematics at the Massachusetts Institute of Technology. The book was published in 1950 by Addison-Wesley Press, Inc., located in Cambridge, Massachusetts.