Try the following sites.

First one is one of the most famous book in farm animals medicine (Radostits et all)

Good luck

https://books.google.ro/books?hl=ro&lr=&id=JP7TBQAAQBAJ&oi=fnd&pg=PT51&dq=goat+respiratory+diseases&ots=NiZ5_SBNdx&sig=KGFAnX9gIxZZ6ti970LrtXOsyTk#v=onepage&q=goat%20respiratory%20diseases&f=false

http://www.merckvetmanual.com/mvm/respiratory_system/respiratory_diseases_of_sheep_and_goats/overview_of_respiratory_diseases_of_sheep_and_goats.html

https://www.researchgate.net/profile/Jose_Lopez48/publication/7138110_Mycoplasma_mycoides_subsp._capri_associated_with_goat_respiratory_disease_and_high_flock_mortality/links/54d380590cf25017918231a3.pdf

https://www.extension.purdue.edu/extmedia/as/as-595-commondiseases.pdf

http://www.nda.agric.za/docs/Infopaks/Respiratorydiseases.pdf

Article Mycoplasma mycoides subsp. capri associated with goat respir...

thanks a lot for this answer  Mr.Gheorghe Solcan.

There are several books on Respiratory diseases of animals. You may find some quite useful.

check this links maybe help you

https://www.vetfood.theclinics.com/article/S0749-0720(15)30364-9/abstract

Article Pathology and distribution of antigen in goats naturally inf...