@book
{TN_libero_mab2,
author = {
Heino, Aarre
},
title = {
The presentation of data with graduated symbols
},
publisher = {Maantieteen laitos},
isbn = {9512908220},
keywords = {
Daten
,
Präsentationsgrafik
,
Graphisches Symbol
},
year = {1996},
abstract = {Aus: Cartographica 32:1 (1995)},
booktitle = {Turun Yliopiston Maantieteen Laitoksen julkaisuja ; 151},
address = {
Turku
},
}