TY  - BOOK
AU  - Laitala,Matti
ED  - Geological Survey of Finland
ED  - Geologian tutkimuskeskus
TI  - Helsingin kartta-alueen kalliopera
SN  - 9516903894
U1  - 552.094897 
PY  - 1991///.
CY  - Espoo: 
PB  - Geological Survey of Finland, , Geologian tutkimuskeskus
KW  - Rocks
KW  - Finland
N1  - Conduct map 1: geological map of Finland. Sheet - 3141 - Ristiina; Conduct map 2: geological map of Finland. Sheet - 2221 - Jalasjarvi; Includes bibliographical references (p. [45]-47)
N2  - Pre-Quaternary rocks of the Helsinki map-sheet area
ER  -