Life's color code
But the unmodified tools which probably preceded modified tools, whether unmodified stones, sticks, or whatever, left no trace. An analysis of the tools used by birds and mammals in obtaining food (Table 6-5) shows that without exception theanbsp;...
| Title | : | Life's color code |
| Author | : | William John Hamilton |
| Publisher | : | McGraw-Hill Companies - 1973 |
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