@Work{OL5108296W,
    title: {Wood heat},
    author: {Vivian, John},
    first_publish_year: {1976}
}

@Work{OL7019239W,
    title: {The family book of camping},
    author: {Leonard Fabian},
    first_publish_year: {1973}
}

@Author{OL1965215A,
    name: {Leonard Fabian},
}