British fungus-flora. A classified text-book of mycology. By George Massee.

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British fungus-flora. A classified text-book of mycology. By George Massee.

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British conchology : or, an account of the Mollusca which now inhabit the British Isles and the surrounding seas / by John Gwyn Jeffreys.

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British conchology : or, an account of the Mollusca which now inhabit the British Isles and the surrounding seas / by John Gwyn Jeffreys.

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British conchology : or, an account of the Mollusca which now inhabit the British Isles and the surrounding seas / by John Gwyn Jeffreys.

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British conchology : or, an account of the Mollusca which now inhabit the British Isles and the surrounding seas / by John Gwyn Jeffreys.

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British conchology : or, an account of the Mollusca which now inhabit the British Isles and the surrounding seas / by John Gwyn Jeffreys.

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On the number of limit cycles bifurcating from a non-global degenerated center

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An illustrated flora of the northern United States, Canada and the British possessions, from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian, by Nathaniel Lord Britton and Addison Brown. The descriptive text chiefly prepared by Britton, with the assistance of specialists in several groups; the figures also drawn under his supervision.

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