O artykule
Data publikacji: 03 paź 2013
Zakres stron: 323 - 327
DOI: https://doi.org/10.2478/jos-2013-0025
This content is open access.
Joseph S Kosler
United States Department of Agriculture National Agricultural Statistics Service (NASS) Research and Development Division 3251 Old Lee Highway Fairfax, VA 22030