Janusz Okrzesik

title	ISBN-13 (ISBN-10)	year of publica- tion	other author(s)
Piersia spoko	978-83-89016-74-4 (83-89016-74-5)	2009	Malwina Okrzesik
Piersia spoko poradnik mamy karmiacej	978-83-61860-06-8 (83-61860-06-1)	2010	"