منابع مشابه
The deep structure of continents
The Lehmann discontinuity at 220-km depth is an important global feature which occurs under both oceans and continents. It is a barrier to penetration by young lithosphere and marks the base of seismicity in regions of continent-continent collision. The strong lateral variation in upper mantle velocities occurs mainly above this depth. Continental roots extend no deeper than about 150-200 km. T...
متن کاملChapter 1 the Intimacies of Four Continents
My study investigates the often obscured connections between the emergence of Eu ro pean liberalism, settler colonialism in the Americas, the transatlantic African slave trade, and the East Indies and China trades in the late eigh teenth and early nineteenth centuries. In Cuban Counterpoint (1940), Fernando Ortiz described " peoples from all four quarters of the globe " who labored in the " new...
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The editorial “Non-physician Clinicians in Sub-Saharan Africa and the Evolving Role of Physicians” by Eyal et al describes non-physician clinicians’ (NPC) need for mentorship and support from physicians. We emphasise the same need of support for front line generalist primary healthcare providers who carry out complex tasks yet may have an inadequate skill mix.
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ژورنال
عنوان ژورنال: Brittonia
سال: 1978
ISSN: 0007-196X
DOI: 10.2307/2806350