| Spring
| Mansfield, Peter; Allbutt, Jon; Arthur, Jim. 1999. TURF Management. January. p. 2-3 [10-11].
| More Keywords | 57920 |
| Summer
| Anonymous. 1999. TURF Management. January. p. 4 [12].
| More Keywords | 57921 |
| Autumn
| Anonymous. 1999. TURF Management. January. p. 6 [14].
| More Keywords | 57922 |
| Winter
| Anonymous. 1999. TURF Management. January. p. 8 [16].
| More Keywords | 57923 |