*[http://www.merckvetmanual.com/mvm/index.jsp?cfile=htm/bc/50713.htm The Merck Veterinary Manual: Enterotoxemia Caused by Clostridium perfringens Types B and C] | *[http://www.merckvetmanual.com/mvm/index.jsp?cfile=htm/bc/50713.htm The Merck Veterinary Manual: Enterotoxemia Caused by Clostridium perfringens Types B and C] |