Celestial navigation (Flight deck uses for the HP-41C series) by MNP Star Enterprises

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HP 48 insights: Principles and programming by Larken Publications

Price:$25.95

HP-20S Scientific Calculator Owner's Manual by Hewlett Packard

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Surveying Programs Book for the HP 33s Calculator by Soil Structure

Price:$149.95

HP 50g Graphing Calculator User's Manual by

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HP-11C (Calculator) Owner's Handbook and Problem Solving Guide by Hewlett-Packard Co

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Applications of the HP 48 G series calculator in probability and statistics by BookSurge Publishing

Practical applications of the HP 48 G series calculator to probability and statistics, including programs, pre-programmed features, and graphical analysis. Price:$24.99

Hewlett-Packard Business Calculator Owner's Manual (HP-10B) by Hewlett-Packard

Price:$4.95

HP 12c Financial Calculator User's Guide by Hewlett-Packard

Price:$7.49

Computational Analysis with the HP 25 Pocket Calculator by John Wiley & Sons Inc

Price:$31.95