77-109
86-91
43-59
70-77
45-55
144-153
notes for a story not always told
25-53
46-65
66-73
58-65
contributions to a state of the art
149-173
50-57
167-184
26-39
74-89
an approach to the state of the art
54-81
170-201
260-265
27-51
13-14