@Article{ Walker_Verma-_RIVERA_Davis-:1615-1623,

author = { Pl Walker Jr- and S. K. Verma- and JOSÉ RIVERA UTRILLA and A. Davis- } ,

title = { DENSITIES, POROSITIES AND SURFACE AREAS OF COAL MACERALS AS MEASURED BY THEIR INTERACTION WITH GASES, VAPOURS AND LIQUIDS },

journal = { Fuel },

year = { 1988 },

volume = { 67 },

pages = { 1615-1623 },

}