Studies of the thickness of the plastic layer of coals :
its determination and significance /
by M.J. Kovalik, D.E. Wolfson, and F. Fischler.

APA Citation

Kovalik, M. J., Fischler, F., Wolfson, D. E. (1964). Studies of the thickness of the plastic layer of coals: its determination and significance. [Washington, D.C.]: U.S. Dept. of the Interior, Bureau of Mines.

MLA Citation

Kovalik, M. J, F Fischler, and D. E Wolfson. Studies of the Thickness of the Plastic Layer of Coals: Its Determination And Significance. [Washington, D.C.]: U.S. Dept. of the Interior, Bureau of Mines, 1964.

Warning: These citations may not always be complete (especially for serials).