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Volume 11 Number 2 April 1973

CONTENTS

Cover Page

L. Carlitz
Enumeration of Two-Line Arrays
113
     Full text

Marjorie Bicknell and V. E. Hoggatt, Jr.
Unit Determinants in Generalized Pascal Triangles
131
     Full text

S. K. Stein
The Density of the Product of Arithmetic Progression
145
     Full text | Letter to the Editor

Selmo Tauber
n-Fibonacci Products
153
     Full text

David Singmaster
Some Corrections to Carlson's "Determination of Heronian Triangles"
157
     Full text

Daniel Shanks and Larry Taylor
An Observation of Fibonacci Primitive Roots
159
     Full text

Hugo S. Sun
A Group-Theoretical Proof of a Theorem in Elementary Number Theory
161
     Full text

Errata 162
     Full text [Part 1] [Part 2] [Part 3]

C. C. Yalavigi
Periodicity of Second- and Third-Order Recurring Sequences
163
     Full text

Murray S. Klamkin
On Solving non-Homogeneous Linear Difference Equations
166
     Full text

Murray S. Klamkin and R. S. Fishman
A Reliability Problem
169
     Full text

Joseph Arkin
The First Solution of the Classical Eulerian Magic Cube Problem of Order Ten
174
     Full text

Selmo Tauber
On K-Numbers
179
     Full text

Edited by Raymond E. Whitney
Advanced Problems and Solutions
184
     Full text

Brother Alfred Brousseau
Through the Other End of the Telescope
189
     Full text

G. D. (Don) Chakerian
The Golden Ratio and a Greek Crisis
195
     Full text

Frederick Stern
Intersections of Lines Connecting Two Parallel Lines
201
     Full text

Joseph L. Ercolano
A Geometric Treatment of Some of the Algebraic Properties of the Golden Section
204
     Full text

Brother Alfred Brousseau
Generalized Fibonacci Shift Formulas
209
     Full text

Edited by A. P. Hillman
Elementary Problems and Solutions
220
     Full text