sources = {
    'core': {
        'title': 'Masks: a New Generation',
        'type':'core book',
        'author':'Brenadan Conway',
        'publisher':'Magpie Games',
        'year':'2016'
    },
    'halcyon': {
        'title':'Halcyon City Herald Collection',
        'type':'setting supplement',
        'author':'Elizabeth Chaipraditkul, et al.',
        'publisher':'Magpie Games',
        'year':'2017'
    },
    'aegis': {
        'title':'Secrets of A.E.G.I.S.',
        'type':'setting supplement',
        'author':'Cam Banks, et al.',
        'publisher':'Magpie Games',
        'year':'2018'
    },
    'unbound': {
       'title':'Unbound',
        'type':'setting supplement',
        'author':'Misha Bushyager, et al.',
        'publisher':'Magpie Games',
        'year':'2018'
    }
}