Penrose, L S to David Klebanow Letter to Dr Klebanow of the Universittsfrauenklinik u. Hebammenschule, Mnchen, regarding results published in Geburtshilfe u. Frauenheilkunde in 1948, and the ages of mothers of children with Down's syndrome. Enclosed is a reprint of results obtained by Penrose whilst researching maternal age and Down's syndrome. 05 Jul 1954