Miscellaneous papers
H. Veenman & Zonen B.V
P. J. den Boer ; with a mathematical appendix by J. Reddingius
H. Veenman & Zonen B.V. 1977 Mededeelingen no. 169 , Miscellaneous papers 14
所蔵館1館
Veenman 1976 Miscellaneous papers 12