@misc{die+pflanzenwelt+der+subtropen,
    author = {Francé, Raoul Heinrich},
    title = {Die Pflanzenwelt der Subtropen},
    address = {Stuttgart},
    publisher = {Kosmos, Gesellschaft der Naturfreunde i Franckh'sche Verlagshandlung},
    date = {1939},
    ISSN = {0935-2635}
}