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		| Paper: | 
		The Cool and Warm Phases of the Interstellar Medium in Spiral Galaxies | 
	 
	
		| Volume: | 
		106, The Minnesota Lectures on Extragalactic Neutral Hydrogen | 
	 
	
		| Page: | 
		1 | 
	 
	
		| Authors: | 
		Walterbos, Rena A. M.; Braun, Robert | 
	 
	
	
		| Abstract: | 
		Introduction; Review of the 21-cm Line and Radiative Transfer; Through Thick and Thin; Warm or Cool: A Brief Review of the Theory; Evidence for a Warm Neutral Atomic Medium in Spiral Galaxies; The Cool Neutral Atomic Medium in Spiral Galaxies; Warm Ionized Medium in Spiral Galaxies; Connection Between the Neutral and Ionized Phases | 
	 
	
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