Earth as a microbiological indicator of sterilization. Dependence of the "resistance" upon the conditions under which the earth is tested for surviving germs; a possibility for the adaption of the resistance to the requirements

Peters, J.; Spicher, G.

Zentralblatt für Bakteriologie Mikrobiologie und Hygiene. 1. Abt. Originale B Hygiene 172(6): 485-497

1981