@misc
{TN_libero_mab2,
author = {
SKIDMORE, ANDREW K.
},
title = {
A comparison of techniques for calculating gradient and aspect from a gridded digital elevation model
},
publisher = {Informa UK Limited},
isbn = {0269-3798},
year = {1989},
url = {
http://slubdd.de/katalog?TN_libero_mab2
}
}