A Things of Science unit from May, 1963 on metal fasteners.
Here is the booklet:
Things of Science #271 — Metal Fasteners
More Things of Science scanned here.
The things:
A Things of Science unit from May, 1963 on metal fasteners.
Here is the booklet:
Things of Science #271 — Metal Fasteners
More Things of Science scanned here.
The things:
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