I had to revise my previous scheme, it was not completed. Indeed 48 crossings with (pure) GSD were involved with 41 different GSD (> some mated twice or three times). I think Margo meant that with the number 48. Yesterday I went searching for the missing dogs in the pedigree and also used the CSV Statistic software "Elf" made available.
Below a revised scheme in alphabetical order. The first column are the GSD, the second the wolves and F1's-F5's they mated with. In green marked are the matings which went on with offsprings which we have today, in red marked the crossings which didn't go on but "died out. Some GSD's are mentioned more than once because they mated 2 or three times.