1. Design of Experiments: a Realistic Approach;Anderson,1974
2. United States of America Public Law 95-87, 95th Congress,1977
3. Effect of Pisolithus tinctorius ectomycorrhizae on growth of loblolly and Virginia pines in the Tennessee Copper Basin;Berry;USDA For. Serv. Res. Note SE-264,1978
4. The Nature and Properties of Soils;Brady,1974