Abstract
CONTENTS
I. Methane–coal deposits 496
II. Methods of studying the "coal–gas" natural system 498
III. Coal as a component of the "coal–gas" system 498
IV. Gas as a component of the "coal–gas" system 501
CONTENTS
I. Methane–coal deposits 496
II. Methods of studying the "coal–gas" natural system 498
III. Coal as a component of the "coal–gas" system 498
IV. Gas as a component of the "coal–gas" system 501