Crockett, J. U., Grunwald, H. A., & Rosse, A. (1985). Lawns ground covers. Time-Life.
Chicago-čujuhus (17. p.)Crockett, James Underwood, Henry Anatole Grunwald, juo Allianora Rosse. Lawns Ground Covers. Virginia: Time-Life, 1985.
MLA-čujuhus (9. p.)Crockett, James Underwood, et al. Lawns Ground Covers. Time-Life, 1985.
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