Nothing in this act shall be construed to in any way, except as herein provided, affect miners' certificates which have been lawfully issued under the provisions of the herein mentioned act, approved May 9, 1889 (P.L. 142).
52 P.S. § 70-217
Nothing in this act shall be construed to in any way, except as herein provided, affect miners' certificates which have been lawfully issued under the provisions of the herein mentioned act, approved May 9, 1889 (P.L. 142).
52 P.S. § 70-217