Pigments.

Animal biochromes and structural colours Fox, Denis Llewellyn 1953 Applied techniques in statistics for selected industries edited by H. Earl Hill, Joseph W. Prane 1984 Artists' pigments c. 1600-1835 Harley, R. D. 1970 Chemical physiology of endoparasitic animals Author not listed Year not listed Colour and colour printing as applied to lithography Richmond, W. D. Year not listed Food analysis by HPLC Author not listed 2000 Natural pigments Ahluwalia, V. K. 2010 Painting materials Gettens, Rutherford J. 1966 Paper coating pigments Murray, Haydn, H. 1966 Textbook of histology: clinical & functional vol 1 Ahmed, M. Mumtazuddin 2007 The materials and techniques of medieval painting Thompson, Daniel V. 1956