In the Geology Library:

The craft of scientific writing.  Michael Alley.
(Geology Library Reserve)  T11 .A37 1996

Rewrite right! : how to revise your way to better writing / Jan
Venolia (Geology Library Reserve)  PE1479.B87 V46 1987

Style : ten lessons in clarity and grace.  (Joseph M. Williams) (Geology Library Reserve)  PE1421 .W545 2000

Online:

Citation Styles Online (Bedford/St. Martins)

Style Sheets for Citing Internet Sources (UC Berkley)

At Ellis Library:

AIP Style Manual (American Institute of Physics)
Ellis Library Reference QC 5.45 .A45 1990

Chicago Manual of Style
Ellis Library Reference Index Table 11:  Z 253 .U69 1993

How to Write and Publish a Scientific Paper (Robert A. Day)
Ellis Library Reference Index Table 11:  T 11 .D33 1998

Manual for Writers of Term Papers, Theses, and Dissertations (Kate Turabian)
Ellis Library Reference Index Table 11:  LB 2369 .T8 1996

MLA Style Manual (Modern Language Association)
Ellis Library Reference Index Table 11:  PN 147 .G444 1998