--subdivision Control under individual weeds and groups of weeds, e.g. Prickly pears--Control; Aquatic weeds--Control; and subdivision Weed control under individual crops and groups of crops, e.g. Corn--Weed control
Here are entered works on special weeks sponsored by individuals, organizations, or governmental bodies interested in publicizing or promoting patriotic, charitable, commercial or other events and observances. --subdivision Anniversaries, etc. under names of countries, cities, etc., names of individual persons and corporate bodies, and under historic and social movements, historic events, classes of persons, and ethnic groups; and subdivision Centennial celebrations, etc. under names of countries, cities, etc., and individual corporate bodies, and under historic events