"Imrei Shefer":

 sefer drush by:

 Harav Shraga Feitel Rabinowitz (SFR = shefer): 

 You can add information if you'd like.

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More information re: contents of this webpage

Also contains a condensed version ofthe sefer" (it was done about 30 years ago; the site indicates the method I used, in order to encourage others to perhaps suggest improvements; not all of it is uploaded to the site, I'll put up more if there's interest); perhaps someone can make an excerpt of the two Hadrans for submission somewhere?