Pringle, J. K., Viel, L., Shewen, P. E., Willoughby, R. A., Martin, S. W., & Valli, V. E. (1988). Bronchoalveolar lavage of cranial and caudal lung regions in selected normal calves: Cellular, microbiological, immunoglobulin, serological and histological variables.

Pringle, J K., L. Viel, P E. Shewen, R A. Willoughby, S W. Martin, et V E. Valli. Bronchoalveolar Lavage of Cranial and Caudal Lung Regions in Selected Normal Calves: Cellular, Microbiological, Immunoglobulin, Serological and Histological Variables. 1988.

Pringle, J K., et al. Bronchoalveolar Lavage of Cranial and Caudal Lung Regions in Selected Normal Calves: Cellular, Microbiological, Immunoglobulin, Serological and Histological Variables. 1988.