Natural Gas Fluids Measurement: Concentric, Square-Edged Orifice Meters – Part 3: Natural Gas Applications
Handbook / Manual / Guide by American Petroleum Institute, 08/01/1992

Natural Gas Fluids Measurement: Concentric, Square-Edged Orifice Meters – Part 4: Background, Development, Implementation, Procedures and Subroutine Documentation
Handbook / Manual / Guide by American Petroleum Institute, 11/01/1992

Natural Gas Fluids Measurement: Calculation of Gross Heating Value, Relative Density and Compressibility Factor for Natural Gas Mixtures from Compositional Analysis
Handbook / Manual / Guide by American Petroleum Institute, 01/01/1981

Natural Gas Fluids Measurement: Continuous Density Measurement
Handbook / Manual / Guide by American Petroleum Institute, 04/01/1991

Mass Measurement of Natural Gas Liquids, Fourth Edition
Handbook / Manual / Guide by American Petroleum Institute, 04/01/2012

Mass Measurement of Natural Gas Liquids, Third Edition
Handbook / Manual / Guide by American Petroleum Institute, 10/01/2009

Natural Gas Fluids Measurement: Standard for Mass Measurement of Natural Gas Liquids
Handbook / Manual / Guide by American Petroleum Institute, 01/01/1995

Natural Gas Fluids Measurement: Liquefied Petroleum Gas Measurement
Handbook / Manual / Guide by American Petroleum Institute, 07/01/1997

Guidelines for the Use of Petroleum Industry-specific International System (SI) Units, Fourth Edition
Handbook / Manual / Guide by American Petroleum Institute, 06/01/2019

Guidelines for Use of the International System of Units (SI) in the Petroleum and Allied Industries, Third Edition
Handbook / Manual / Guide by American Petroleum Institute, 12/11/2001