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  1. By: Ferguson, Dennis E. - Boyd, Raymond J. - Intermountain Research Station (Ogden, Utah)
    Publication info: [Ogden, Utah], U.S. Dept. of Agriculture, Forest Service, Intermountain Forest and Range Experiment Station, 1988
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
    Subjects: Bracken fern  Competition (Biology)  Conifers  Idaho  Phytotoxins  Seeds  Viability  
  2. By: Pearson, R. G. - Ontario. Air Resources Branch. Phytotoxicology Section.
    Publication info: [Toronto], Phytotoxicology Section, Air Resources Branch, 1990
    Holding Institution: Ontario Ministry of the Environment
    Subjects: Ontario  Phytotoxins  Plant diseases  Soils  Trace element content  Windsor  
  3. By: Gizyn, W. I. - Ontario. Ministry of the Environment. Phytotoxicology Section.
    Publication info: [Toronto], Standards Development Branch, Phytotoxicology Section, Ontario Ministry of Environment and Energy, 1994
    Holding Institution: Ontario Ministry of the Environment
    Subjects: Environmental aspects  Ontario  Phytotoxins  Polycyclic aromatic hydrocarbons  Toxicity testing  UCAR Carbon Canada Incorporated  Welland  
  4. By: Ontario. Ministry of Environment and Energy. - Emerson, R. N.
    Publication info: Toronto, Ministry of Environment and Energy, 1994
    Holding Institution: Ontario Ministry of the Environment
    Subjects: Cornwall Island  Fluorides  Ontario  Phytotoxins  Toxicity testing  Toxicology  Vegetation surveys  
  5. By: Kelsey, Rick G. - Harrington, Michael G. - Intermountain Forest and Range Experiment Station (Ogden, Utah)
    Publication info: Ogden, Utah, Intermountain Forest and Range Experiment Station, Forest Service, U.S. Dept. of Agriculture, 1979
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
    Subjects: Growth  Phytotoxins  Ponderosa pine  Seedlings