The web site devoted to the French aviation - men, machines, acomplishments. Don't be afraid of the French language, the pdf docs are OCR-friendly, so you can copy the text of interest and tranlate it in you (on-line mostly) translator.
Dossiers historiques et techniques sur l'industrie aéronautique française
Also - don't be dissapointed when reading eg. that M-105 (Russian development of the HS-12Y) was regularly outfitted with two stage compressor
Dossiers historiques et techniques sur l'industrie aéronautique française
Also - don't be dissapointed when reading eg. that M-105 (Russian development of the HS-12Y) was regularly outfitted with two stage compressor