Real variables [by] Claude W. Burrill [and] John R. Knudsenby Claude W. BurrillFunctions of real variablesWriting a summary for young readers…For young readersBook data: Open Library
![Cover of Real variables [by] Claude W. Burrill [and] John R. Knudsen](https://covers.openlibrary.org/b/id/5731303-M.jpg)