13. Acta Universitatis Agriculturae Sueciae. Agraria 553,144 SVENSSON ANN-CATHRIN Molecular analyses of human endogenous retrovirus ERV9 : marker for HLA-DR haplotype evolution : doctoral thesis / Ann-Cathrin Svensson : Swedish University of Agricultural Sciences. - Uppsala : SUAS, 1996. - 59, [50] pag. varia: il., wykr. ; 24 cm. - (Acta Uni ver sitatis Agriculturae Sueciae. Agraria, 1401-6249 ; 13) ISBN 91-576-5224-