TY - RPRT TI - Hydration of natural glass and formation of perlite AU - I. Friedman AU - R.L. Smith AU - W.D. Long PY - 1966 DO - 10.1130/0016-7606(1966)77[323:hongaf]2.0.co;2 UR - https://pubs.usgs.gov/publication/70206947 ID - 70206947 ER -