bibliography rendering "Pp." instead of "pp." for page numbers

Question

My .bib file contains the following entry:

@incollection{test,
  author = "Ove Grandstrand",
  title       = "Innovation and Intellectual Property Rights",
  editor      = "Jan Fagerberg and David C. Mowery and Richard R. Nelson",
  booktitle   = "The Oxford Handbook of Innovation",
  publisher   = "Oxford University Press",
  address     = "Oxford",
  year        = 2004,
  pages       = "266-290",
  chapter     = 10,
}

When I compile with latex and bibtex and the natbib package using the humannat style, I get the following rendering:

Grandstrand, O. 2004. Innovation and intellectual property rights. In The Oxford Handbook of Innovation, J. Fagerberg, D. C. Mowery, and R. R. Nelson, eds., chapter 10, Pp. 266–290. Oxford: Oxford University Press.

Of course, "Pp." is wrong: the first p shouldn't be capitalized. What's going wrong here?

Update:

Here's the latex file I'm using:

\documentclass[11pt]{article} 
\usepackage{amssymb}
\usepackage{graphicx}
\usepackage{fancybox}
\usepackage[margin=1in]{geometry}
\usepackage{hyperref}
\usepackage{framed}
\usepackage{fancyhdr}
\usepackage{soul}
\usepackage{multicol}
\usepackage{float}
\usepackage{color}
\usepackage{mathtools}
\usepackage{setspace}
\usepackage[square]{natbib}

\usepackage[T1]{fontenc}
\usepackage[sc,osf]{mathpazo}

 \begin{document}

Here are some natbib examples. You can cite examples using the citation key \citep{bar} in your .bib file. There are commands for in-text citations, like \citet{bar}. And you can pass an option to specify additional details, such as a page or chapter number, as an option \citep[p. 130]{bar}. For another example, see \cite{test}.

\bibliography{references}
\bibliographystyle{humannat}

\end{document}

Answer 1

That's the way that humannat.bst was defined. See sample humannat references here, and note that it uses Pp. by default. You need to modify the style file manually if you want to change it to pp. If you're bent on using Bibtex:

1. Download the humannat.bst file from CTAN here.
2. Open it up with your editor, search for Pp. You should see a line that says { "Pp.~" pages n.dashify tie.or.space.connect }.
3. Change the "Pp.~" to "pp.", as well as the "P.~" in the line below it to "p.". (i.e. Remove the ~ and change the capitalization of the P's.)
4. Save the .bst file as a copy under a new name (say, humannatpp.bst).
5. Place the .bst file in the same directory as your main .tex file.
6. Compile with Bibtex etc. and you're done.