Bestand
20.1968,8,19-24,28-29,32-45; 21.1968/69,1-32,35,38,41-47; 23.1970 - 28.1975; 31.1978
Bestandslücken
[N=20.1968,20-21,23,39,43; 21.1968/69,6,20,46; 23.1970,7,10-12,15,17,19,21,33,35; 24.1971,1,3,4,7,16,22,24-25,32,35,38-39,41-42; 25.1972,7,27,35,38-41,44,47; 26.1973,11,16,27-28,31; 27.1974,1-2,35; 28.1975,33]