2004ISO 7937:2004 Microbiology of food and animal feeding stuffs - Horizontal method for the enumeration of Clostridium perfringens - Colony-count technique
1997ISO 7937:1997 Microbiology of food and animal feeding stuffs - Horizontal method for enumeration of Clostridium perfringens - Colony-count technique
1985ISO 7937:1985 Microbiology; General guidance for enumeration of Clostridium perfringens; Colony count technique