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26 After the Alta avalanche of December 30, 1973 [26]1973-12-31; 1974-01Image/StillImage
27 After the Alta avalanche of December 30, 1973 [27]1973-12-31; 1974-01Image/StillImage
28 After the Alta avalanche of December 30, 1973 [28]1973-12-31; 1974-01Image/StillImage
29 After the Alta avalanche of December 30, 1973 [29]1973-12-31; 1974-01Image/StillImage
30 Bob Marsh avalanche education slide presentation [121]1960; 1961; 1962; 1963; 1964; 1965; 1966; 1967; 1968; 1969; 1970; 1971; 1972; 1973; 1974; 1975; 1976; 1977; 1978; 1979; 1980; 1981; 1982; 1983; 1984; 1985Image/StillImage
31 Bob Marsh avalanche study graphs [001]1971-11Image/StillImage
32 Bob Marsh avalanche study graphs [002]1971-11Image/StillImage
33 Bob Marsh avalanche study graphs [003]1971-11Image/StillImage
34 Bob Marsh avalanche study graphs [004]1971-11Image/StillImage
35 Bob Marsh avalanche study graphs [005]1971-11Image/StillImage
36 Bob Marsh avalanche study graphs [006]1971-11Image/StillImage
37 Bob Marsh avalanche study graphs [007]1971-11Image/StillImage
38 Bob Marsh avalanche study graphs [008]1971-11Image/StillImage
39 Bob Marsh avalanche study graphs [009]1971-11Image/StillImage
40 Bob Marsh avalanche study graphs [010]1971-11Image/StillImage
41 Bob Marsh avalanche study graphs [011]1971-11Image/StillImage
42 Bob Marsh avalanche study graphs [014]1971-11Image/StillImage
43 Bob Marsh avalanche study graphs [015]1971-11Image/StillImage
44 Bob Marsh avalanche study graphs [016]1971-11Image/StillImage
45 Bob Marsh avalanche study graphs [017]1971-11Image/StillImage
46 Bob Marsh avalanche study graphs [018]1971-11Image/StillImage
47 Bob Marsh avalanche study graphs [022]1971-11Image/StillImage
48 Bob Marsh avalanche study graphs [028]1971-11Image/StillImage
49 Bob Marsh avalanche study graphs [029]1971-11Image/StillImage
50 Bob Marsh avalanche study graphs [045]1971-11Image/StillImage
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