Bibliography    A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | Before 1880 | Databases / Unp. data

1. Lapied (2014, unp. data) — Lapied, E., 2014. Personal data.
2. Ramabu (2011, unp. data) — Ramabu, E., 2011. Botswana start producing organic fertilizer from earthworms. Department of Agricultural Research, Botswana Ministry of Agriculture. The Bostwana Gazette.