Here you will find various oilfield reference and sizing tools.

Download	Concentration Conversions This print-out has quick convertions for concentration convertions. This reference chart includes: - mol / kmol - ppm - mole fraction - percent
Download	Legal Survey Base Map Guide Still can't figure out the LSD base map system? This reference guide can help.
Download	Engineers Calculator This free unit converter software is designed specifically for engineers. It includes a wide range of technical categories required by engineers, but it excludes the archaic and esoteric units that clutter the menus of the other conversion programs.