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DB1 - BASIC SYSTEMS - The Natural Result Series - "How to get to the Corners" -
Catalog No. 3C-BS-101. Updated October 10, 2009

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DB2 - BASIC SYSTEMS - The Natural Result Series - "Across the Length of the Table" - Catalog No. 3C-BS-102 - Updated October 10, 2009

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DB3 - BASIC SYSTEMS - The Natural Result Series - "Around the Table without English"
Catalog No. 3C-BS-103 - Updated October 10, 2009

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MORE TITLES COMING SOON!

DB4 - INTERMEDIATE SYSTEMS - The Systematic use of English Series
"Around the Table with English"
Catalog No. 3C-BS-201 - Coming Soon!!!!

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