00277nam a2200109Ia 450000500170000000800410001708200150005810000160007324500250008926000450011430000080015920260224040846.0260224s9999||||xx |||||||||||||| ||und||  a574.87 COH  aCohn, N.S.  0aElements of cytology  aNew York, HARCOurt, Brace & World c1979  a495