TY - BOOK AU - Campbell,Michael J. AU - Machin, David., coaut. TI - Medical statistics a commonsense approach T2 - c SN - 0-471-93764-9 U1 - 610.72 1993 PY - 1993/// CY - Chichester, England PB - John Hopkins University Press KW - Medicina KW - Estadística ER -