FIGURE 2. Irwin-Williams profile B?/YY, with Irwin-Williams' unit designations,1964?, Hueyatlaco Site (redrafted from Irwin-Williams' original by VSM).
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FIGURE 2. Irwin-Williams profile B?/YY, with Irwin-Williams' unit designations,1964?, Hueyatlaco Site (redrafted from Irwin-Williams' original by VSM).
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