1           2004-10-14.32  
 2           2004-10-17.31  
 3           2004-10-18.33  
 4           2004-10-21.38  
 5           1976-10-19.31  Wisniewski et al. (1997) 
 6           1976-10-19.32  Wisniewski et al. (1997) 
 7           1976-10-24.28  Wisniewski et al. (1997) 
 8           1976-10-25.27  Wisniewski et al. (1997) 
 9           1976-10-30.19  Wisniewski et al. (1997) 
10           1976-11-23.22  Wisniewski et al. (1997) 
11           1976-11-24.19  Wisniewski et al. (1997) 
12           1990-09-24.35  Wisniewski et al. (1997) 
13           1990-09-24.36  Wisniewski et al. (1997) 
14           1990-09-24.35  Wisniewski et al. (1997) 
15           1992-06-06.31  Wisniewski et al. (1997) 
16  2004-08-20--2008-06-10  Lowell