TY  - RPRT
TI  - An improved antigen for the paratuberculosis complement fixation test.
AU  - J A Morris
AU  - A E Stevens
PY  - 1977
DO  - 10.1016/s0092-1157(77)80017-6
UR  - https://pubmed.ncbi.nlm.nih.gov/925040/
ID  - 925040
ER  -