{
  "name": "Known then: Seatrain's interstate route, 1932",
  "desc": "Known then: card for Seatrain's 1932 decision to open an interstate rail-car route; each item carries its source number from the article.",
  "lic": "CC BY 4.0",
  "lic_url": "https://creativecommons.org/licenses/by/4.0/",
  "by": "Treaties & Tradeoffs",
  "url": "https://treatiesandtradeoffs.com/ideas/shipping-container/",
  "from": [],
  "how": "",
  "data_by": [
    "United States v. Pennsylvania R. Co., 323 U.S. 612 (1945), United States Reports, accessed 2026-11-02, public domain (U.S. court opinion)",
    "United States v. Seatrain Lines, 329 U.S. 424 (1947), United States Reports, accessed 2026-11-02, public domain (U.S. court opinion)"
  ]
}