**[http://www.ivis.org/advances/Parasit_Bowman/ddb_resp/chapter_frm.asp?LA=1 Cat and dog respiratory parasites (part 1)] - Nasal Mucosa and Sinuses, and Respiratory Parenchyma
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**[http://www.ivis.org/advances/Parasit_Bowman/ddb_resp2/chapter_frm.asp Cat and dog respiratory parasites (part 2)] - Trachea and Bronchi, and Pulmonary Vessels