@Article{ RUEDA:165-170,

author = { MARÍA DEL MAR RUEDA GARCÍA } ,

title = { THE PROBLEM OF OPTIMUM WEIGTHS IN STRATIFIED SAMPLING },

journal = { REVISTA DE LA REAL ACADEMIA DE CIENCIAS DE ZARAGOZA },

year = { 1993 },

volume = { 48 },

issn = { 0370-3207 },

pages = { 165-170 },

}