Timestamp (Pacific Time),Amazon.com,Amazon.co.uk,Amazon.ca,Amazon.fr,Amazon.de,Amazon.co.jp
"2010, August (08)",3,,,,,
"2010, July (07)",1,,,,,
"2010, June (06)",5,,,,,
"2010, May (05)",4,,,,,
"2010, April (04)",6,,,,,
"2010, March (03)",12,,,,,
"2010, February (02)",14,,,,,
,,,,,,
High School Mathematics Contests: part 4,R. Todev,Paperback,,,,