Science and Technology
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| NutsandBolts.com https://www.nutsandbolts.com/grade-8-bolts.html Specialty nuts, bolts and screws in grade 5 and grade 8. | |
| Life Sciences Data Archive http://lsda.jsc.nasa.gov/ A work in progress that provides information and from space flight experiments funded by the National Aeronautics and Space Administration. | |
