1           1981-02-07.27  Schober (1983) 
2           1981-02-07.29  Schober (1983) 
3           1981-02-07.34  Schober (1983) 
4           1981-02-07.38  Schober (1983) 
5  1998-01-29--2012-04-23  Lowell