@misc{indiciae697676450b20, title = {Letter: Technique for the NBT test.}, author = {A E Green and L F Isherwood}, year = {1973}, doi = {10.1136/jcp.26.9.726-b}, url = {https://pubmed.ncbi.nlm.nih.gov/4127541/}, note = {Source identifier: 4127541} }