“Danielle A.I. Groffen. Material Versus Psychosocial Explanations of Socioeconomic Differences in Health-Related Function in Older People. Proefschrift. Maastricht: Universitaire Pers Maastricht, 2011. 158 P”. Tijdschrift voor Gerontologie en Geriatrie, no. 1 (March 21, 2012). Accessed December 22, 2024. https://testplatform.openjournals.nl/tgg/article/view/16896.