Downs, R., Piringer, H., Borthwick, H., Piringer, A. Light and plants. A series of experiments demonstrating light effects on seed germination, plant growth, and plant development. Washington: U.S. Gov. Print. Office, 1966 18 p.
Downs, R., Piringer, H., Borthwick, H., Piringer, A. Light and plants. A series of experiments demonstrating light effects on seed germination, plant growth, and plant development. Washington: U.S. Gov. Print. Office, 1966 18 p.
Downs, R., Piringer, H., Borthwick, H., Piringer, A. (1966) Light and plants. A series of experiments demonstrating light effects on seed germination, plant growth, and plant development, Washington: U.S. Gov. Print. Office 18 p.
Downs, R., Piringer, H., Borthwick, H., & Piringer, A. (1966). Light and plants. A series of experiments demonstrating light effects on seed germination, plant growth, and plant development. Washington: U.S. Gov. Print. Office, 18 p.
Downs R, Piringer H, Borthwick H, Piringer A. Light and plants. A series of experiments demonstrating light effects on seed germination, plant growth, and plant development. Washington: U.S. Gov. Print. Office; 1966. p. 18 p.
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