Authors
Piotr Tomski
Czestochowa University of Technology, Poland
Faiza Manzoor
Department of Agricultural Economics and Management, Zhejiang University, Hangzou, China
© 2019 Piotr Tomski, Faiza Manzoor, published by Quality and Production Managers Association
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.