Flavius:
What point are you trying to make? Soviet historiography does not make a great deal of reference to the Rzhev-Sychevka operation (Mars, in operational parlance). But Krivosheev shows that the casualties thereof are freely available to the public (as evidenced in both his opus on Soviet wartime losses, and references thereto in Glantz's own 'When Titans Clashed'). It is not 'hidden'. It's poorly covered. There is a very significant difference.
Soviet historians do not focus on Mars to any great extent for the same reason that German historians choose to overlook a multitude of shattering defeats (like the Lake Balaton operation, for example). A non-decisive strategic engagement that did not in the least alter the military balance, but resulted in casualties. These battles had no drama to them, and their impact was primarily on the units engaged and the strategic reserves. Why else do we concentrate on Kursk, but not on Belgorod-Kharkov, or its sister operation?
I've never even heard of Operation Mars till Glantz. I don't recall if Zhukov covered it in his book I read back in the 1970's either.
Why would either surprise you? Rzhev-Sychevka was Zhukov's brainchild. He surely was not going to be the one to obsess with his costliest failure. That Western audiences would not have information on the operation until Glantz 'uncovered' it (by reading publicly available archives, no less) should be even less surprising... Western access to Soviet archives pre-Perestroika was extremely poor.
Glantz claims that as many as 40% of the battles that took place in the Eastern Front have been systematically ignored by the Russians for a variety of reasons.
The inference (I'm sorry, but this is sounding like conspiracy theory, prima facie) is laughable. Glantz himself would laugh at it, no less. He
would say, however, that Russian historians have previously not spent a great deal of time covering operations of lesser strategic importance (either in conception or due to an unfavorable result). Both due to censorship, which only eased in the 80s (and the cult of WW2 is stronger in modern Russia than anywhere else in the world, Germany included), and due to the fact that there is very little popular demand for dry accounts of Soviet failures (and that cult also plays into this). As it stands, the
information is available to any serious researcher. Glantz, whose niche is exploring a facet of the Second World War that remains relatively unknown in the West (the Soviet experience of the war) has a ready audience for any material that 'sheds light' on his favorite topic.
Which is why Glantz's 1,000 page account of the Stalingrad fighting (the driest account available, by far) - definitely a brilliant piece of academic research, nonetheless - will sell well. It's not engaging; the information is available in Russian and has been for decades, but Western complete-ist enthusiasts will love the day-by-day narrative of the military action.
Your suggestion, to me at least, seems to be an instance of fitting the facts to the case, rather than the other way around.