API 13B2-1991 Supplement 2 (1996)
Practica Recomendada Procedimiento Estandar para las Pruebas de Campo con Fluidos de Perforacion de Base Aceite - 1991 edicion
Amendment by American Petroleum Institute, 03/01/1996
API Std 681 Datasheets
Datasheets for API Std 681, Liquid Ring Vacuum Pumps and Compressors for Petroleum, Chemical, and Gas Industry Services
Data Sheet by American Petroleum Institute, 02/01/1996
API Spec 6AV1 (R2008)
Specification for Verification Test of Wellhead Surface Safety Valves and Underwater Safety Valves for Offshore Service(includes Errata dated December 1996)
standard by American Petroleum Institute, 02/01/1996