http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
study of labor utilization in the vegetable and citrus industries in the Lower Rio Grande Valley
Staff paper series (Texas Agricultural Experiment Station. Department of Agricultural Economics) ; SP-9
Departmental information report (Texas Agricultural Experiment Station. Department of Agricultural Economics) ; DIR 85-1