I'm a glaciologist user of declassified US Spy satellite images (Corona Key Hole satelites, Hexagon, etc.), that provide an extraordinary record of glacier extent at resolutions equivalent to about 4 meters per pixel ([see this amazing example](https://easyzoom.com/imageaccess/eca134f8bc084bb7a8a562c2001d5cb3)). There are also ex Soviet Union declassified images from the '60s onward from satellites like [Zenit-4](http://space.skyrocket.de/doc_sdat/zenit-4.htm), [Resurs-F1](http://space.skyrocket.de/doc_sdat/resurs-f1-17f41.htm), [Okean-O1](http://space.skyrocket.de/doc_sdat/okean-o1.htm), etc. with similar technical specification than the US images or maybe better (they had [color and NIR capability](http://mentallandscape.com/C_CatalogEarth.htm)). However all my attempts to access such images end up in pages written in Russian that I can't understand or navigate trough. Some interesting information about sources of imagery is [here](https://groups.google.com/forum/#!topic/comp.infosystems.gis/3nUdJXPdA68) (search for "Subject: Russian Imagery"), but with my null knowledge of Russian I haven't been able to find where to order such imagery, not an online catalog, nor to find if such catalog even exist.

So: **Does anyone know how to access/order declassified ex Soviet Union imagery?**

[EDIT January 25 2018: I've added and answer below with information I found regarding an archive containing part of the images but not all.]

As an example, here is a 1973 Zenith image taken over antarctica:
[![enter image description here](https://i.stack.imgur.com/JzOmh.jpg)](https://i.stack.imgur.com/JzOmh.jpg)

And here is a crop of the above image compared with Landsat 7 ETM+ at 30 meters per pixel. However, according to specifications, properly scan film should provide a much sharper and detailed image:
[![enter image description here](https://i.stack.imgur.com/7OnXD.jpg)](https://i.stack.imgur.com/7OnXD.jpg)