Contrex, Inc. · Telsco Industries
| title | ISBN-13 | year of publication |
|---|---|---|
| 20 Secretos Para Contratistas De Jardineria | 978-0-9643401-1-4 | 1995 |
| 20 Secrets For Landscape Contractors | 978-0-9643401-0-7 | 1994 |
| 20 Secrets For Masonry and Concrete Contractors | 978-0-9643401-2-1 | 1995 |
| 21 Secrets For Irrigation Contractors | 978-0-9635096-1-1 | 1996 |