Viswanathan, R.
Asia Publishing House , 1964
Buku Teks
Reny Fahdiyani, author
Padjajaran University, Faculty of Medicine, Master of Public Health, 2016
Artikel Jurnal
Ivker, Robert S.
G.P. Putnam's Sons , 1995
Buku Teks
Viswanathan, C.G.
Print House, 1985
Buku Referensi
School for Resource and Environmental Studies Dalhousil University , 1988
Buku Teks