64c783ad1b75774499d6e1cbd98d25890ca01d75  supnov_a1987n2.pdf
4c1e6b651b77390272caf3be70f8eb216a84090e  supnov_a1988n3.pdf
175b329fada8cbef890d4c20ab3cf0a09e3b63b8  supnov_a1988n4.pdf