I started looking at FeRh back in 2015 with Gino Hrkac in Exeter and Tom Thomson’s group in Manchester. This interesting material undergoes a change in its magnetic state from antiferromagnetic to ferromagnetic upon changing temperature (other stimuli are also possible). One of the original papers was by Fallot and Hocart and is regularly cited as such in the literature. However, I found that whilst it was well cited, I could not find a copy of the paper. It was often cited as – M. Fallot and R. Horcart, Rev. Sci. 77, 498 (1939). I tried for a while to find out which journal Rev. Sci. was by googling journal abbreviations (e.g. here) but to no avail.
Eventually, I tracked down the journal, which turned out to be “La Revue Scientifique”, which is a historic French journal founded in 1838 and, interestingly, also known as “La Revue Rose” due to the colour of its cover and in opposition to “La Revue Blue” (the nickname of “La Revue Politique et littéraire”. The particular edition (volume 77) from January 1939 has been scanned and can be found at the following link.