Tanner, Don: 25 Tricks and Ideas With the Square Circle ©1980 (circa) Don Tanner, Popular Magic Publications, OH Softcover, comb-bound, 5.5x8.5"

Image courtesy MagicInc.net

Comments: Short ideas, tips, and tricks with the Square Circle magic prop.

Contents (from MagicInc.net's web description, numbers are not page numbers):

1 Act
2 Time Machine
3 Silks
4 Flowers
5 Silks and Liquids
6 Streamers
7 Birthday Party
8 Parties
9 Candy
10 Commercial
11 Milk
12 Fish
13 Bowling
14 Sports
15 Rabbits
16 Flowers
17 Christmas
18 Cans
19 Breakfast Set
20 Ring or Watch
21 Fire
22 Candles
23 Candle/Salt
24 Transposition
25 Juggling Balls
26 Cards or Bills