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Electronic Data Processing
Bartel, Günter, (1962)
Osnovi na avtomatiziranata sistema na dǔržavanata statistika (ASGS) : Prevel J. Božkov
Bojarski, A. Ja., (1973)
Departmental report / Department of Health and Office of Population Censuses and Surveys : the government's expenditure plans ...
(1993)