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Hydroids of the Pacific Coast of Canada and the United States
pocket,
1937,
Engelska,
ISBN 9781487598785
Hydroids of the Pacific Coast of Canada and the United States is an attempt to give a brief description, with figures, of every hydroid species known to occur along the Pacific …
Half-Hours with Great Scientists
pocket,
1948,
Engelska,
ISBN 9781487598778
The present age is sometimes called the Scientific Age. This does not imply that every member of the community is an expert scientist—far from it. It does mean, however, that the …