@book{5390, author = {Jamsa, Kris A.}, title = {DOS, the complete reference /}, publisher = {Osborne McGraw-Hill,}, year = {c1993.}, address = {New Delhi :}, edition = {4th ed.}, note = {"Covers all versions, including DOS 6"--Cover.}, url = {http://www.loc.gov/catdir/toc/mh022/93175843.html} }