Hobbs G. H., Mckinney J., . (1972). Practical mathematics. Bombay: D B Taraporevala.
Hobbs Glenn H, Mckinney James, . 1972. Practical mathematics. Bombay: D B Taraporevala.
Hobbs Glenn H, Mckinney James, . Practical mathematics. Bombay: D B Taraporevala. 1972.
