Eye lens membranes and aging : proceedings of the EURAGE Symposium on "Eye lens membranes and aging" held in Ghent, Belgium, October 6-8, 1991 / ed. Gijs F.J.M. Vrensen, Julius ClauwaertHandleiding neuroanatomische kleurtechnieken = Manual of neuroanatomical staining methods / onder red. van H.B.M. Uylings, E. Marani, A.H.M. Lohman en G. Vrensen