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		| Paper: | 
		Sub-millimetre and Millimetre Studies | 
	 
	
		| Volume: | 
		211, Massive Stellar Clusters | 
	 
	
		| Page: | 
		305 | 
	 
	
		| Authors: | 
		Josselin, E. | 
	 
	
	
		| Abstract: | 
		(Sub)millimetre observations are the most adapted to study molecular and atomic gas and cold dust in regions such as molecular clouds and circumstellar envelopes. I review here the available (sub)milli-metre instrumentation and the future projects, such as SOFIA, FIRST and ALMA. Some of the expected results, such as the observation of on-going formation of stellar clusters, are briefly discussed. | 
	 
	
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