Hopkins, Tim. Numerical methods in practice : using the NAG Library / Tim Hopkins [and] Chris Phillips. - Wokingham, Eng. : Addison-Wesley, 1988. - xi, 308 p. : ill. - International computer science series . ISBN: 0201192489 LCCN: 92034003 Subjects--Topical Terms: NAG Library (Computer programmes).Subroutines (Computer programmes).Numerical analysis--Data processing.FORTRAN (Computer programme language)