The final volume of Teilhard's collected essays, containing two texts of key importance published for the first time: "The Heart of Matter" and "The Christic." Foreword by N. M. Wildiers; Index. Translated by Rene Hague. A Helen and Kurt Wolff Book

The Heart of Matter 2002, Harcourt Children's Books

ISBN-13: 9780156027588

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Heart of Matter 1980, Mariner Books

ISBN-13: 9780156400046

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The Heart of Matter 1978, Fount, London

ISBN-13: 9780002153126

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