1. [1] Magnus O. Historia de gentibus septentrionalibus. Romae (Facsimile Copenhagen 1970). Engl transl 1996;1998:1555.
2. [2] Ramazzini B. De Mortis Artificum Diatriba. The Latin text of 1713, rev. with translation and notes by W. C. Wright. Chicago, IL (USA): University of Chicago Press 1940.
3. [3] Buchan R, Kramer G. A field test of a procedure for the identification of protein-bearing particles in grain elevator air. ACS Publications 1980:301-7.
4. [4] Nayak P. Problems and prospects of rice mill modernization: a case study. J Assam University 1996;1(1):22-8.
5. [5] Batsungnoen K, Kulworawanichpong T. Effect of dust particles in local rice mills on human respiratory system. World Academy of Science, Engineering and Technology 2011;80:421-6.