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- E-bookFlying Small HelicoptersHelen Krasner
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- E-bookHelicopter Flying Instructor ExperiencesHelen Krasner
- E-bookFlying Historic HelicoptersHelen Krasner
- E-bookMy Foreign Flying AdventuresHelen Krasner
- E-bookFlying Unusual HelicoptersHelen Krasner
- E-bookLearning to Fly Aeroplanes and HelicoptersHelen Krasner
- E-bookSéries: Collected Rotary Flight Test Articles 2004-2011Helen Krasner
- E-bookSéries: Collected Articles From Flight Training News 2006-2011Helen Krasner