1. Fred , K. Paul , K.J. 1959 Separation of hydrogen sulfide and methane
2. Milton , W.E. 1965 Method of separating oxygen from air
3. Turner , N.C. 1957 Gas dehydration apparatus and process
4. Hull , J.R. 1955 Dehydrator
5. Skarstrom , C.W. 1960 Method and apparatus for fractionating gaseous mixtures by adsorption