APA

Gas Processors Association G., . (1994). Tentative low-pressure field method for determining ethyl mercaptan odorant in LP-gas using length of stain tubes. Tulsa, Oklahoma: Gas Processors Association, GPA.

Chicago

Gas Processors Association GPA, . 1994. Tentative low-pressure field method for determining ethyl mercaptan odorant in LP-gas using length of stain tubes. Tulsa, Oklahoma: Gas Processors Association, GPA.

Harvard

Gas Processors Association G., . (1994). Tentative low-pressure field method for determining ethyl mercaptan odorant in LP-gas using length of stain tubes. Tulsa, Oklahoma: Gas Processors Association, GPA.

MLA

Gas Processors Association GPA, . Tentative low-pressure field method for determining ethyl mercaptan odorant in LP-gas using length of stain tubes. Tulsa, Oklahoma: Gas Processors Association, GPA. 1994.