Harris (2005), p. 38. (EN) S.L. Harris, Lassen Peak, in Fire Mountains of the West: The Cascade and Mono Lake Volcanoes, 3ª ed., Missoula, Mountain Press Publishing Company, 2005, ISBN0-87842-511-X.
Harris (2005), p.73. (EN) S.L. Harris, Lassen Peak, in Fire Mountains of the West: The Cascade and Mono Lake Volcanoes, 3ª ed., Missoula, Mountain Press Publishing Company, 2005, ISBN0-87842-511-X.
Harris (2005), p. 89. (EN) S.L. Harris, Lassen Peak, in Fire Mountains of the West: The Cascade and Mono Lake Volcanoes, 3ª ed., Missoula, Mountain Press Publishing Company, 2005, ISBN0-87842-511-X.
Harris (2005), p. 96. (EN) S.L. Harris, Lassen Peak, in Fire Mountains of the West: The Cascade and Mono Lake Volcanoes, 3ª ed., Missoula, Mountain Press Publishing Company, 2005, ISBN0-87842-511-X.
Harris (2005), p. 97. (EN) S.L. Harris, Lassen Peak, in Fire Mountains of the West: The Cascade and Mono Lake Volcanoes, 3ª ed., Missoula, Mountain Press Publishing Company, 2005, ISBN0-87842-511-X.
Harris (2005), p.90. (EN) S.L. Harris, Lassen Peak, in Fire Mountains of the West: The Cascade and Mono Lake Volcanoes, 3ª ed., Missoula, Mountain Press Publishing Company, 2005, ISBN0-87842-511-X.
Harris (2005), p. 92. (EN) S.L. Harris, Lassen Peak, in Fire Mountains of the West: The Cascade and Mono Lake Volcanoes, 3ª ed., Missoula, Mountain Press Publishing Company, 2005, ISBN0-87842-511-X.
Harris (2005), p.93. (EN) S.L. Harris, Lassen Peak, in Fire Mountains of the West: The Cascade and Mono Lake Volcanoes, 3ª ed., Missoula, Mountain Press Publishing Company, 2005, ISBN0-87842-511-X.
Harris (2005), p. 94. (EN) S.L. Harris, Lassen Peak, in Fire Mountains of the West: The Cascade and Mono Lake Volcanoes, 3ª ed., Missoula, Mountain Press Publishing Company, 2005, ISBN0-87842-511-X.
Harris (2005), p. 95. (EN) S.L. Harris, Lassen Peak, in Fire Mountains of the West: The Cascade and Mono Lake Volcanoes, 3ª ed., Missoula, Mountain Press Publishing Company, 2005, ISBN0-87842-511-X.
Harris (2005), pp. 94–95. (EN) S.L. Harris, Lassen Peak, in Fire Mountains of the West: The Cascade and Mono Lake Volcanoes, 3ª ed., Missoula, Mountain Press Publishing Company, 2005, ISBN0-87842-511-X.
Harris (2005), p. 91. (EN) S.L. Harris, Lassen Peak, in Fire Mountains of the West: The Cascade and Mono Lake Volcanoes, 3ª ed., Missoula, Mountain Press Publishing Company, 2005, ISBN0-87842-511-X.
Harris (2005), p. 75. (EN) S.L. Harris, Lassen Peak, in Fire Mountains of the West: The Cascade and Mono Lake Volcanoes, 3ª ed., Missoula, Mountain Press Publishing Company, 2005, ISBN0-87842-511-X.
Harris (2005), p.83. (EN) S.L. Harris, Lassen Peak, in Fire Mountains of the West: The Cascade and Mono Lake Volcanoes, 3ª ed., Missoula, Mountain Press Publishing Company, 2005, ISBN0-87842-511-X.
Harris (2005), p. 74. (EN) S.L. Harris, Lassen Peak, in Fire Mountains of the West: The Cascade and Mono Lake Volcanoes, 3ª ed., Missoula, Mountain Press Publishing Company, 2005, ISBN0-87842-511-X.
Harris (2005), p. 98. (EN) S.L. Harris, Lassen Peak, in Fire Mountains of the West: The Cascade and Mono Lake Volcanoes, 3ª ed., Missoula, Mountain Press Publishing Company, 2005, ISBN0-87842-511-X.
Harris (2005), pp. 97-98. (EN) S.L. Harris, Lassen Peak, in Fire Mountains of the West: The Cascade and Mono Lake Volcanoes, 3ª ed., Missoula, Mountain Press Publishing Company, 2005, ISBN0-87842-511-X.