Even after you find the CLSI M40-A2 PDF, laboratories often make critical errors:
Her supervisor, a pragmatist named Dr. Vance, shook his head. “Those swabs were stored at the wrong temperature for 18 hours during the power outage. The package insert says they’re invalid.” clsi m40-a2 pdf
Public and university libraries can request a copy for temporary reference via ILL. Even after you find the CLSI M40-A2 PDF,