+++ A Filter Testing Workshop will be conducted June 17-21 in Boston. ... Abstracts must be submitted by April 15 to Conference Coordinator, ACEMB, Suite 212, 5480 Wisconsin Ave., Chevy Chase, Md. 20015. +++ A ... +++ A directory of U. S. S Puerto Rican hydraulic cement companies is available from B.C. Brown, Bureau of Mines, U.S. Dept. of Interior, Wash., D.C. 20240. +++ A directory of aquot;Government Air Pollution Agencies , aquot; for 1973-74 is available from W.T. Beery, Air Pollutionanbsp;...
|Title||:||Washington Science Trends|