TY - RPRT TI - Seasonal variation of the upper digestive tract yeast flora of feral pigeons AU - R. M. Kocan AU - H.F. Hasenclever PY - 1974 DO - 10.7589/0090-3558-10.3.263 UR - https://pubs.usgs.gov/publication/5224120 ID - 5224120 ER -