TY  - RPRT
TI  - Sputum screening by Nomarski interference contrast microscopy.
AU  - D F Welch
AU  - M T Kelly
PY  - 1979
DO  - 10.1128/jcm.9.4.520-524.1979
UR  - https://pubmed.ncbi.nlm.nih.gov/88462/
ID  - 88462
ER  -