TY - BOOK AU - Checkland,Peter AU - Scholes, Jim.,coaut. TI - Soft systems methodology in action SN - 0-471-92768-6 U1 - 003 1990 PY - 1990/// CY - Chichester, England PB - John Hopkins University Press KW - AnĂ¡lisis Multivariado KW - TeorĂ­a de Sisitemas ER -