Observation:Prid:Pt:Tiss:Nom:Silver impregnation stain.Dieterle
observation:prid:pt:tiss:nom:silver impregnation stain.dieterle
Observation:Prid:Pt:Tiss:Nom:Silver impregnation stain.Dieterle
observation:prid:pt:tiss:nom:silver impregnation stain.dieterle