00270nam a2200109Ia 450000500170000000800410001708200120005810000210007024500230009126000380011430000080015220260224040835.0260224s9999||||xx |||||||||||||| ||und||  a637 HAM  aBernard W Hammer 0aDairy bacteriology  aNew York: John Wiley & Sonsc1948  a593