Greater Pittsburgh region construction aggregates /

Bibliographic Details
Main Author:	O'Neill, Bernard J., 1920-
Format:	Book
Language:	English
Published:	Harrisburg : Pennsylvania Geological Survey, l974.
Series:	Mineral resource report ; 67.
Subjects:	Aggregates (Building materials) > Pennsylvania > Pittsburgh Region.

Description
Item Description:	In portfolio.
Physical Description:	l portfolio (vii, 60 pages : 2 folded color maps, folded table) ; 23 cm.
Bibliography:	Bibliography: pages 50-52.