Marlo, Ed: Card Switches ©1961 Edward Marlo, Ireland Magic, Chicago, IL Softcover, saddle-stitched, 5.5x8.5", 65 pages

Image courtesy eBay seller Ajs121067

Comments: Chapter 12 of Revolutionary Card Technique.
The chapters of Marlo's Revolutionary Card Technique Include (info courtesy Genii's Magicpedia):
Chapter 1 Miracle Card Changes (1954)
Chapter 2 Action Palm (1956)
Chapter 3 Fingertip Control (1956)
Chapter 4 Side Steal (1957)
Chapter 5 The Tabled Palm (1957)
Chapter 6 The Faro Shuffle (1958)
Chapter 7 Faro Notes (1958)
Chapter 8, 9, 10 Seconds, Centers, and Bottoms (1960)
Chapter 11 The Multiple Shift (1961)
Chapter 12 Card Switches (1961)
Chapter 13, 14 Estimation (1962)

Contents (page numbers added courtesy Marc Decoux, magicbooks.be):

1 Introduction

2 Rear Flat Palm
2 Rear Angle Palm
3 Thumb Clip Palm
3 Latest Thumb Clip Palm
3 Changing Palm Positions
4 Flat Card Pickup
5 Rear Angle Palm To Flat Rear Palm
5 Flat Rear Palm To Rear Angle Palm
6 Getting Into The Palm Positions: 10 methods
9 Methods of Unloading The X Card After The Switch
9 The Flexible Unload
11 The Card Switch Transfer
12 Single Card Switches
12 An Impressive Sequence
16 A Simpler Sequence
17 A Third Sequence
18 Further Alignment Move Switches
21 Variations of the First Switch: three variations
24 Marlo's Card Switch
26 Additional Methods For Getting Into The Basic Position: five methods
27 Methods of Disclosure: three methods
28 Effects Using The Mario Card Switch: two effects
30 Mario's Push Switch
32 Push Switch Variation
33 The Circular Change (Marlo & D'Amico)
35 Rub-A-Dub Change (Marlo)
35 In and Out Switches: four methods
38 Unloading Switches: three methods
42 Without The Deck
43 Pseudo Card Cheat's Switches: two methods
44 Simplest Push Switch
46 Angle Palm Switch
49 Additional Rear Palm Switches: two methods
50 Top Palm Switch
50 The Throw Switch
51 One Hand Switch
52 Another Rear Palm Switch
54 The Spread Switch
55 Switcheroo
59 Monte Swindle
60 Mario's Regulation Palm Switches: two methods
63 Added Notes