A search of <"field service regulations" 1935> returns this result. The database is a good first stop with over 72,000 repositories participating. One issue to be aware of is lack of standardization. For example, some catalogers seem to have created a single record for all of the volumes of FSR 1935 while others seem to have created a record for each of the individual volumes.
Anyways, hope it helps! Good hunting.
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