Sober A., . (1997). Year book of dermatology 1997. London: Mosby.
Sober A.J, . 1997. Year book of dermatology 1997. London: Mosby.
Sober A.J, . Year book of dermatology 1997. London: Mosby. 1997.
The system was implemented with technical support of the Library, Open University of Sri Lanka, Contact: 011-2690760