TY  - DATA
AU  - Hans-Dietrich Gronau, Hanns-Heinrich Langmann, Dierk Schleicher
TI  - 50th IMO - 50 Years of International Mathematical Olympiads
SN  - 9783642145650
PY  - 2011///
PB  - Springer Berlin Heidelberg
KW  - Mathematics and Statistics
UR  - https://doi.org/10.1007/978-3-642-14565-0
ER  -