APA

Gas Processors Association G., . (1977). Test for hydrogen suldide and carbon dioxide in natural gas using length of stain tubes. Tulsa, Oklahoma: Gas Processors Association, GPA.

Chicago

Gas Processors Association GPA, . 1977. Test for hydrogen suldide and carbon dioxide in natural gas using length of stain tubes. Tulsa, Oklahoma: Gas Processors Association, GPA.

Harvard

Gas Processors Association G., . (1977). Test for hydrogen suldide and carbon dioxide in natural gas using length of stain tubes. Tulsa, Oklahoma: Gas Processors Association, GPA.

MLA

Gas Processors Association GPA, . Test for hydrogen suldide and carbon dioxide in natural gas using length of stain tubes. Tulsa, Oklahoma: Gas Processors Association, GPA. 1977.