1           1981-08-25.40  Harris et al. (1992) 
 2           1981-09-01.21  Lagerkvist & Rickman (1982) 
 3           1981-09-02.17  Lagerkvist & Rickman (1982) 
 4           1981-09-04.17  Lagerkvist & Rickman (1982) 
 5           1981-09-04.40  Harris et al. (1992) 
 6           1981-09-06.26  Harris et al. (1992) 
 7           1981-09-07.37  Harris et al. (1992) 
 8           1981-09-08.26  Harris et al. (1992) 
 9           1981-09-09.32  Harris et al. (1992) 
10           1981-09-20.29  Harris et al. (1992) 
11           2013-12-09.01  
12           2013-12-10.08  
13           2014-02-17.16  
14           2014-02-17.32  
15           2014-02-18.18  
16           2014-02-18.32  
17  1998-06-02--2012-04-02  Lowell