@book{ 0-1615317937, title = {Alfredo Jaar, studies on happiness 1979 - 1981}, author = {Jaar, Alfredo and Valdés, Adriana}, editor = {Jaar, Alfredo}, editor = {Valdés, Adriana}, address = {Barcelona}, publisher = {Actar}, year = {1999}, isbn = {8495273020}, isbn = {9788495273024}, language = {English}, url = {https://katalog.gfzk.de/Record/0-1615317937} }