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(a) Total H2 (i) and H2O (ii) contents extracted from some Apollo lunar soils and regolith breccias; (b) δD versus total extracted H2 (i) and molar H2O/H2 ratio (ii) from some Apollo lunar soils and regolith breccias. Dotted grey lines have been fitted visually through the data points. Data are from [32–40].
