@misc{indiciae7e604dfa9ff1, title = {[Study of microbial involvement in chronic bronchitis].}, author = {H Vojtová and J Klhufek and M Novak and S Feitová}, year = {1972}, url = {https://pubmed.ncbi.nlm.nih.gov/4667238/}, note = {Source identifier: 4667238} }