Não informado. (1960). Greenhouse, garden, grass. Plant Research Institute, Department of Agriculture.
Citace podle Chicago (17th ed.)Não informado. Greenhouse, Garden, Grass. Ottawa: Plant Research Institute, Department of Agriculture, 1960.
Citace podle MLA (8th ed.)Não informado. Greenhouse, Garden, Grass. Plant Research Institute, Department of Agriculture, 1960.
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