Medienwissenschaftler JO GROEBEL zu Gast im Lettra-Studio. Thema: das Medium Buch. http://www.amazon.de/Empirische-Medienpsychologie-Book-Demand-Groebel/dp/362127071X%3FSubscriptionId%3DAKIAIJH4ULR4TWPM5CZA%26tag%3Dlettra02-21%26linkCode%3Dxm2%26camp%3D2025%26creative%3D165953%26creativeASIN%3D362127071X
