Foucault-L mail-list

Does anyone know of any resources that give the date of composition of Foucault's essays, or the date of presentation of his lectures, or the date on which interviews were undertaken, and so on and so forth.

The reason I ask is that I have been asked to provide this information rather than date of publication, and yet I have been unable to find any way of establishing the date of composition/presentation/interview/etc. as opposed to the date of publication. 
 
Thanks in advance for any help with this. 

Regards,
Kevin

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