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The oyster-shell scale and the scurfy scale
- Quaintance, A. L. and Sasscer, E. R.
- Farmers' bulletin (United States. Department of Agriculture) ; no. 723 1916
- fruit trees, orchards, sulfur, street trees, shade trees, shrubs, scale insects, horticultural oils, insecticidal soaps, plant pests, spraying, ornamental trees, life cycle (organisms), Oyster-shell scale, and Scurfy scale
- U.S. Dept. of Agriculture
- Organic Roots Collection