Professional Disease
http://www.4shared.com/document/EJoEG5_t/4_Musculoskeletal_Dr_Stoyneva.html
http://www.4shared.com/document/U9mh4i6j/6_EMF_English.html
http://www.4shared.com/document/viWURfKw/Ch17-GI-1.html
Conspect :
http://www.4shared.com/document/_NjOpSF_/Konspekt_occup_dis_English.html
Ruzgar Miroglu