الشركات موافق عليها الألمانية
موافق للشريعة اليهودية
Yacov Lipschutz, Kashruth: A Comprehensive Background and Reference Guide to the Principles of York: Mesorah Publiions Ltd, 1989; Binyomen Forst, The Laws of Kashrus, Mozniam, 1999 James M. Lebeau, The Jewish Dietary Laws: Sanctify Life, United Synagogue of Conservative Judaism, New York, 1983 Mary Douglas, "Purity and Danger: An analysis of the ....