TY - GENERIC DO - 10.20944/preprints202104.0192.v1 UR - http://dx.doi.org/10.20944/preprints202104.0192.v1 TI - Eco-Efficiency and Human Capital Efficiency on the Example of Small and Medium-Sized Family Farms in the Selected European Countries T2 - Preprints AU - Polcyn, Jan PY - 2021 DA - 2021/04/07 PB - Preprints