by Webb, Robert H. , Robert H. Webb , Stanley A. Leake , Raymond M. Turner
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Debris flows from tributaries of the Col...
Environmental effects of off-road vehicl...
Lee's Ferry
Damming Grand Canyon
Elementary Wave Optics
Requiem for the Santa Cruz
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Advances in imaging and electron physics
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Edible medicinal and non-medicinal plant...
Insect-Plant Interactions