@book{Frietsch+2019, url = {https://doi.org/10.3790/9783428471164}, title = {Bestimmungsgründe der Sparquote}, title = {}, author = {Heinz Frietsch}, publisher = {Duncker & Humblot}, address = {}, doi = {doi:10.3790/9783428471164}, isbn = {9783428471164}, year = {1991}, lastchecked = {2019} }