| Bluegrass varieties and height of mowing
| Davis, R. R.; Parsons, J. L. 1961. Lawn and Ornamentals Days [Ohio]. p. 1.
| More | 273874 |
| Lawn grasses and mixtures
| Davis, R. R. 1961. Lawn and Ornamentals Days [Ohio]. p. 1-2.
| More | 273875 |
| Bentgrass varieties
| Davis, R. R.; Bader, K. L.; Runnels, H. A. 1961. Lawn and Ornamentals Days [Ohio]. p. 2-3.
| More | 273877 |
| Reel-type or rotary mower?
| Davis, R. R.; Gilbert, D. E.; Polivka, J. B. 1961. Lawn and Ornamentals Days [Ohio]. p. 3-4.
| More | 273879 |