![Comparison of the type and number of microorganisms and concentration of endotoxin in the air of feedyards in the Southern High Plains]()
Comparison of the type and number of microorganisms and concentration of endotoxin in the air of feedyards in the Southern High PlainsPurdy, Charles W.; Straus, David C.; Parker, David B.; Wilson, Stephen C.; Clark, R. Nolan · American Journal of Veterinary Research · 2004