Roger G Langevin

Roger G Langevin is the author of "Langevin Snippets ... from a to Z", "Customer Focus" and "The Langevin Legacy".

Books by Roger G Langevin

Customer Focus
Langevin, Roger G.
Other book format: $12.95

The Langevin Lega...
Langevin, Roger G.
Paperback: $19.99

Langevin Snippets...
Langevin, Roger G.
Digital (delivered electronically): $3.99

The Langevin Lega...
Langevin, Roger G.
Hardback: $29.99