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    "source_url": "https://archive.org/details/arboretumetfruti01loudrich",
    "source_metadata_url": "https://archive.org/metadata/arboretumetfruti01loudrich",
    "source_title": "Arboretum et fruticetum britannicum; or, The trees and shrubs of Britain, native and foreign, hardy and half-hardy, pictorially and botanically delineated, and scientifically and popularly described; with their propagation, culture, management, and uses in the arts, in useful and ornamental plantations, and in landscape-gardening; preceded by a historical and geographical outline of the trees and shrubs of temperate climates throughout the world",
    "verified_publication_year": "1854",
    "rights_basis": "Archive date, volume1, and NOT_IN_COPYRIGHT statement.",
    "rights_statement": "NOT_IN_COPYRIGHT",
    "bibliographic_creator": "Loudon, J. C. (John Claudius), 1783-1843",
    "contributor": "University of California Libraries",
    "source_collection": "US-PD-Books",
    "source_license": "Public Domain",
    "checked_on": "2026-10-23",
    "retained_chunks": 5
  },
  {
    "source_record_id": "journalofforestr01lond_30",
    "source_url": "https://archive.org/details/journalofforestr01lond",
    "source_metadata_url": "https://archive.org/metadata/journalofforestr01lond",
    "source_title": "The journal of forestry and estates management",
    "verified_publication_year": "1877–1878",
    "rights_basis": "Archive volume field 1,1877–1878 and NOT_IN_COPYRIGHT statement.",
    "rights_statement": "NOT_IN_COPYRIGHT",
    "bibliographic_creator": null,
    "contributor": "New York Botanical Garden, LuEsther T. Mertz Library",
    "source_collection": "English-PD",
    "source_license": "Public Domain",
    "checked_on": "2026-10-23",
    "retained_chunks": 2
  },
  {
    "source_record_id": "18440-0-12",
    "source_url": "https://www.gutenberg.org/ebooks/18440",
    "source_metadata_url": "https://www.gutenberg.org/ebooks/18440",
    "source_title": "Logic: Deductive and Inductive",
    "verified_publication_year": "1914 fourth edition; reprint history through May 1920",
    "rights_basis": "Original catalog marks Public domain in the USA; author Carveth Read (1848-1931). Fourth-edition preface August 1914; reprint history through May 1920. Bibliographic attribution only; provider boilerplate omitted from model text.",
    "rights_statement": "Public domain in the USA.",
    "bibliographic_creator": "Carveth Read (1848-1931)",
    "contributor": "Project Gutenberg volunteers; Common Corpus curation by Pleias",
    "source_collection": "Gutenberg",
    "source_license": "Public Domain",
    "checked_on": "2026-10-23",
    "retained_chunks": 30
  }
]