au.\*:("WILLETT RW")
Results 1 to 2 of 2
Selection :
COAL.WILLETT RW.1965; COMMON.MINING.METAL.CONGR.; 1965, VOL. 4, P. 279 A 329Miscellaneous
LIMESTONES AND MARBLES.WILLETT RW.1965; COMMON.MINING.METAL.CONGR.; 1965, VOL. 4, P. 271 A 278Miscellaneous