00557nam a22001817a 4500 101125t xxu||||| |||| 00| 0 eng d 0442318138 0442280203 21 604.7 Sax Irving, N. 7637 Dangerous Properties of Industrial Material/ by N. Irving Sax, Richard J. Lewis,SR. 7th Ed., New York: Van Nostrand Reinhold, c1989. xxxiii,1707p.: Harzadous substances Manual 7639 Lewis, Richard J. SR. 7641 ddc BK 3222 3222