TY - BOOK ED - WHO Scientific Group on the Evaluation and Testing of Drugs for Mutagenicity: Principles and Problems. ED - World Health Organization , TI - Evaluation and testing of drugs for mutagenicity: principles and problems : report U1 - 616.9 23 PY - 1971/// CY - Geneva PB - World Health Organization KW - Mutagenesis KW - Drugs KW - Testing KW - Physiological effect ER -