St. John, Rodney; Christians, Nick | Basic Cation ratios for sand-based greens (2007 - USGA TERO) | R=124493 |
St. John, Rodney; Christians, Nick | Soil testing methods for sand-based putting greens (2006 - USGA TERO) | R=112051 |
Christians, Nick; St. John, Rodney | Cation ratios and soil testing methods for sand-based golf course greens (2005Y3) | R=109831 |
Christians, Nick; St. John, Rodney | Cation ratios and soil testing methods for sand-based golf course greens (2004Y2) | R=101221 |
Christians, Nick | Cation ratios and soil testing methods for sand-based golf course greens (2003Y1) | R=93187 |