John Gall
John Gall has written at least 4 books. Their most popular book is The Systems Bible with 9 saves with an average rating of 2⭐.
John Gall has written at least 4 books. Their most popular book is The Systems Bible with 9 saves with an average rating of 2⭐.
2002 • 9 Readers • 314 pages • 2
1977 • 4 Readers • 4
1977 • 2 Readers
1978 • 112 pages