Umbra #1, 1975
Umbra #2, 1975
Umbra #3, 1975
Umbra #7, 1975
Umbra #10, 1977
Umbra #15, 1977
Umbra #20, 1976
Umbra #24, 1978
Umbra #25, 1975
Umbra #29, 1977
Umbra #30, 1975
Umbra #31, 1977
Umbra #37, 1978
Umbra #38, 1975
Umbra #48, 1977
Umbra #6, 1975