The Viagens Interplanetarias stories
by L. Sprague de Camp

Here is a list of the stories, taken from Wikipedia's article “Viagen Interplanetarias” as of 29 July 2015. I have not checked their dates.

Title Written Setting Baen
Book
Place(s) Times(s)
The Inspector's Teeth 1950 Earth 2054, 2088 CM&c
Summer Wear 1950 Earth/Osiris2104-28 CM&c
The Colorful Character 1949 Earth 2117
The Galton Whistle 1951 Vishnu 2117 CM&c
The Animal-Cracker Plot 1949 Vishnu 2120 CM&c
Git Along! 1950 Osiris 2135-48 CM&c
Perpetual Motion 1950 Krishna 2137 CM&c
The Queen of Zamba 1949 Krishna 2138
Calories 1951 Krishna 2139
Finished 1949 Krishna 2114, 2140 CM&c
The Hand of Zei 1950 Krishna 2132, 2143-4
The Hostage of Zir 1977 Krishna 2148 (NLFS)
The Prisoner of Zhamanak 1982 Krishna ~2149
The Virgin of Zesh 1953 Krishna 2150 V&T
The Bones of Zora 1983 Krishna 2151
The Continent Makers 1951 Earth 2153 CM&c
The Tower of Zanid 1958 Krishna 2168 V&T
The Swords of Zinjaban 1991 Krishna 2171
Rogue Queen 1951 Ormazd ? (NLFS)
The Stones of Nomuru 1988 Kukulkan ?
The Venom Trees of Sunga 1992 Kukulkan (Nomuru + 1 generation)

Key for Baen Books:
CM&c The Continent Makers and other tales of the Viagens (NLFS at Baen)
V&T The Virgin of Zesh and the Tower of Zanid (NLFS at Baen)