diff --git a/plate-tool-lib/src/csv.rs b/plate-tool-lib/src/csv/conversion.rs
similarity index 68%
rename from plate-tool-lib/src/csv.rs
rename to plate-tool-lib/src/csv/conversion.rs
index 3655773..f9cfeab 100644
--- a/plate-tool-lib/src/csv.rs
+++ b/plate-tool-lib/src/csv/conversion.rs
@@ -3,35 +3,8 @@ use crate::util::*;
 
 use serde::{Deserialize, Serialize};
 use std::error::Error;
+use super::TransferRecord;
 
-#[derive(Serialize, Deserialize, Debug)]
-pub struct TransferRecord {
-    #[serde(rename = "Source Plate", alias = "source plate", alias = "src plate")]
-    pub source_plate: String,
-    #[serde(rename = "Source Well", alias = "source well", alias = "src well")]
-    pub source_well: String,
-    #[serde(
-        rename = "Dest Plate",
-        alias = "dest plate",
-        alias = "destination plate"
-    )]
-    pub destination_plate: String,
-    #[serde(
-        rename = "Destination Well",
-        alias = "destination well",
-        alias = "dest well"
-    )]
-    pub destination_well: String,
-    #[serde(rename = "Transfer Volume", alias = "transfer volume")]
-    #[serde(default = "volume_default")]
-    pub volume: f32,
-    #[serde(rename = "Concentration", alias = "concentration")]
-    pub concentration: Option<f32>,
-}
-
-pub fn volume_default() -> f32 {
-    Transfer::default().volume
-}
 
 pub fn transfer_to_records(
     tr: &Transfer,
diff --git a/plate-tool-lib/src/csv/mod.rs b/plate-tool-lib/src/csv/mod.rs
new file mode 100644
index 0000000..fddbe32
--- /dev/null
+++ b/plate-tool-lib/src/csv/mod.rs
@@ -0,0 +1,6 @@
+mod transfer_record;
+mod conversion;
+
+pub use transfer_record::volume_default;
+pub use transfer_record::TransferRecord;
+pub use conversion::*;
diff --git a/plate-tool-lib/src/csv/transfer_record.rs b/plate-tool-lib/src/csv/transfer_record.rs
new file mode 100644
index 0000000..794c2ad
--- /dev/null
+++ b/plate-tool-lib/src/csv/transfer_record.rs
@@ -0,0 +1,33 @@
+use serde::{Deserialize, Serialize};
+
+use crate::transfer::Transfer;
+
+#[derive(Serialize, Deserialize, Debug)]
+pub struct TransferRecord {
+    #[serde(rename = "Source Plate", alias = "source plate", alias = "src plate")]
+    pub source_plate: String,
+    #[serde(rename = "Source Well", alias = "source well", alias = "src well")]
+    pub source_well: String,
+    #[serde(
+        rename = "Dest Plate",
+        alias = "dest plate",
+        alias = "destination plate"
+    )]
+    pub destination_plate: String,
+    #[serde(
+        rename = "Destination Well",
+        alias = "destination well",
+        alias = "dest well"
+    )]
+    pub destination_well: String,
+    #[serde(rename = "Transfer Volume", alias = "transfer volume")]
+    #[serde(default = "volume_default")]
+    pub volume: f32,
+    #[serde(rename = "Concentration", alias = "concentration")]
+    pub concentration: Option<f32>,
+}
+
+pub fn volume_default() -> f32 {
+    Transfer::default().volume
+}
+