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Gerard Koolhaas
| Last name | Koolhaas |
| First name | Gerard |
| Gender | Male |
| Birthdate | 08.1950 |
| Country | NED |
| 500m | 42,90 (Heerenveen, 05.02.1974) |
| 1.000m | 1.27,3 (Heerenveen, 05.02.1974) |
| 1.500m | 2.13,6 (Heerenveen, 03.03.1974) |
| 3.000m | 4.41,4 (Heerenveen, 25.02.1974) |
| 5.000m | 8.24,8 (Heerenveen, 26.02.1974) |
| Sprint | 86,550 |
| Small Combo | 184,813 |
| Mini Combo | 177,983 |
| Tiny Combo | 131,083 |
| Latest update in | 1974 |
NED