@misc
{TN_libero_mab2,
author = {
Mallory, Virgil S.
},
title = {
Activity in Mathematics—The Slow-Moving Pupil
},
publisher = {National Council of Teachers of Mathematics},
isbn = {0025-5769},
isbn = {2330-0582},
year = {1936},
url = {
http://slubdd.de/katalog?TN_libero_mab2
}
}