In earlier days Acta Crystallographia did not have a volume that just gives crystal structure information in a short communications. Because X-ray crystal structure determination had not then become a routine work using computer programs. For earlier work you should search by just using term like "crystal structure of xxx". But you can as well consult Crystal Structures by Wykhoff or also Structure Reports. These are all multivolume works and should be available in any good library. Also you can consult Landolt Bronstein volumes.

We use SciFinder Scholar to access information in selected Chemical Abstracts Service (CAS) databases. Putting chemical structure and then searching for the crystal structure of any given molecule, that how I do it. This or similar databases should be helpful. Otherwise, the only option left it is to search the crystal by its name.