Jón Magnússon var lögmaður og kom víða við á ferli sínum sem sjá má af eftirfarandi lista yfir greinar og ritgerðir hans.
- Off-Street Parking facilities for New York – 28 Brooklyn Law Rev 239
- Municipal Bond Buying Considerations by Fisical Advicers – 15 TheBusiness Lawyer 292 (endurprentað í The Daily Bond Buyer)
- Parking Facilities – Some Legal and Financial Considerations – 46 Virginia Law Rev. 595
- Lease Financing by Municipal Corporations as a Way Around Debt Limitations – 25 George Washington Rev 377
- Observations on the Economic Regulations of the Civil Aeronautics Board – 18 Journal of Air Law and Commerce 181
- World Trade Center – 172 The Bond Buyer 1317
- Our Membership in the United Nations and the Federal Treaty Power – 34 Virginia Law Rev. 137
- Shipping Cnference Dual Rate Contract Arrangements – 38 St. Johns Law Review 221
- The Need for International Agreement on Obtaining Evidence from Foreign Countries – 26 Federal Bar Journal 232