للمتابعه من هنا
1-http://www.rapidlearningcenter.com/biology/microbiology/20-Respiratory-System-Infections.html
2-http://emedicine.medscape.com/article/302460-overview
3-http://www.scribd.com/doc/21732246/Microbial-Diseases-of-the-Respiratory-System
4-http://www.cliffsnotes.com/study_guide/Bacterial-Diseases-of-the-Respiratory-System.topicArticleId-8524,articleId-8496.ht
5-http://en.wikipedia.org/wiki/Respiratory_disease
6-http://classes.midlandstech.edu/carterp/Courses/bio225/chap24/lecture2.htm
7-http://www.microbiologyprocedure.com/microbes-and-atmosphere/bacterial-diseases-of-the-upper-respiratory-system.html
8-http://faculty.irsc.edu/faculty/sbowen/Micro%20Lecture/Micro%20Ch%2022.htm
9-http://www.atsu.edu/faculty/chamberlain/Website/lectures/lecture/introurt.htm