Dear Mr. Wolff,
Thank you for posting your request on History Hub!
We searched the National Archives Catalog and located a series titled “German Field and Technical Manuals and Tables of Organization and Equipment” in the National Archives Collection of Foreign Records Seized (Record Group 242) that might contain materials you seek. Part of the records have been microfilmed as National Archives Microfilm Publication T238, “German Military and Technical Manuals, 1910-1945.”
Further, we would suggest looking into a few other microfilm publications located in Record Group 242 that may contain the publication by Dr. Ing. Schwab. These microfilm publications include: Microfilm Publication T175 “Records of the Reich Leader of the SS and Chief of the German Police,” T580 “Captured German Records Filmed in Berlin,” T611 “Captured German Documents Filmed at Berlin (University of Nebraska),” and A3345 “Miscellaneous Collections” (Berlin Document Center Records).
There are finding aids to some of these microfilm publications that can be viewed online by following these steps: (1) go to www.archives.gov; (2) click “Research Our Records;” (3) click “Microfilm Catalog;” (4) in the first search box (Search by Microfilm Publication Number or Keyword) enter the microfilm publication number (e.g. T175) in the search box and click “search;” (5) click the hyperlinked title of the publication; (6) click “View Important Publication Details” (an Adobe PDF document will open).
For the microfilm publications without finding aid available in a digital format, a hard copy of a finding aid is available in the Microfilm Reading Room (Room 4050) at the National Archives at College Park, MD where these microfilmed records can be viewed free of charge. Please note that the original records were returned to Germany and may be accessed at the Bundesarchiv.
Due to the COVID-19 pandemic and pursuant to guidance received from the Office of Management and Budget (OMB), NARA has adjusted its normal operations to balance the need of completing its mission-critical work while also adhering to the recommended social distancing for the safety of NARA staff. As a result of this re-prioritization of activities, you may experience a delay in receiving an initial acknowledgement as well as a substantive response to your reference request. Also, all of the research rooms and microfilm reading rooms are closed. We apologize for this inconvenience and appreciate your understanding and patience.
We hope this information is helpful. Best of luck with your research!